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1da177e4 LT |
1 | /* |
2 | * originally based on the dummy device. | |
3 | * | |
4 | * Copyright 1999, Thomas Davis, tadavis@lbl.gov. | |
5 | * Licensed under the GPL. Based on dummy.c, and eql.c devices. | |
6 | * | |
7 | * bonding.c: an Ethernet Bonding driver | |
8 | * | |
9 | * This is useful to talk to a Cisco EtherChannel compatible equipment: | |
10 | * Cisco 5500 | |
11 | * Sun Trunking (Solaris) | |
12 | * Alteon AceDirector Trunks | |
13 | * Linux Bonding | |
14 | * and probably many L2 switches ... | |
15 | * | |
16 | * How it works: | |
17 | * ifconfig bond0 ipaddress netmask up | |
18 | * will setup a network device, with an ip address. No mac address | |
19 | * will be assigned at this time. The hw mac address will come from | |
20 | * the first slave bonded to the channel. All slaves will then use | |
21 | * this hw mac address. | |
22 | * | |
23 | * ifconfig bond0 down | |
24 | * will release all slaves, marking them as down. | |
25 | * | |
26 | * ifenslave bond0 eth0 | |
27 | * will attach eth0 to bond0 as a slave. eth0 hw mac address will either | |
28 | * a: be used as initial mac address | |
29 | * b: if a hw mac address already is there, eth0's hw mac address | |
30 | * will then be set from bond0. | |
31 | * | |
1da177e4 LT |
32 | */ |
33 | ||
34 | //#define BONDING_DEBUG 1 | |
35 | ||
1da177e4 LT |
36 | #include <linux/kernel.h> |
37 | #include <linux/module.h> | |
1da177e4 LT |
38 | #include <linux/types.h> |
39 | #include <linux/fcntl.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/ptrace.h> | |
42 | #include <linux/ioport.h> | |
43 | #include <linux/in.h> | |
169a3e66 | 44 | #include <net/ip.h> |
1da177e4 | 45 | #include <linux/ip.h> |
169a3e66 JV |
46 | #include <linux/tcp.h> |
47 | #include <linux/udp.h> | |
1da177e4 LT |
48 | #include <linux/slab.h> |
49 | #include <linux/string.h> | |
50 | #include <linux/init.h> | |
51 | #include <linux/timer.h> | |
52 | #include <linux/socket.h> | |
53 | #include <linux/ctype.h> | |
54 | #include <linux/inet.h> | |
55 | #include <linux/bitops.h> | |
56 | #include <asm/system.h> | |
57 | #include <asm/io.h> | |
58 | #include <asm/dma.h> | |
59 | #include <asm/uaccess.h> | |
60 | #include <linux/errno.h> | |
61 | #include <linux/netdevice.h> | |
62 | #include <linux/inetdevice.h> | |
a816c7c7 | 63 | #include <linux/igmp.h> |
1da177e4 LT |
64 | #include <linux/etherdevice.h> |
65 | #include <linux/skbuff.h> | |
66 | #include <net/sock.h> | |
67 | #include <linux/rtnetlink.h> | |
68 | #include <linux/proc_fs.h> | |
69 | #include <linux/seq_file.h> | |
70 | #include <linux/smp.h> | |
71 | #include <linux/if_ether.h> | |
72 | #include <net/arp.h> | |
73 | #include <linux/mii.h> | |
74 | #include <linux/ethtool.h> | |
75 | #include <linux/if_vlan.h> | |
76 | #include <linux/if_bonding.h> | |
b63bb739 | 77 | #include <linux/jiffies.h> |
c3ade5ca | 78 | #include <net/route.h> |
457c4cbc | 79 | #include <net/net_namespace.h> |
1da177e4 LT |
80 | #include "bonding.h" |
81 | #include "bond_3ad.h" | |
82 | #include "bond_alb.h" | |
83 | ||
84 | /*---------------------------- Module parameters ----------------------------*/ | |
85 | ||
86 | /* monitor all links that often (in milliseconds). <=0 disables monitoring */ | |
87 | #define BOND_LINK_MON_INTERV 0 | |
88 | #define BOND_LINK_ARP_INTERV 0 | |
89 | ||
90 | static int max_bonds = BOND_DEFAULT_MAX_BONDS; | |
7893b249 | 91 | static int num_grat_arp = 1; |
1da177e4 LT |
92 | static int miimon = BOND_LINK_MON_INTERV; |
93 | static int updelay = 0; | |
94 | static int downdelay = 0; | |
95 | static int use_carrier = 1; | |
96 | static char *mode = NULL; | |
97 | static char *primary = NULL; | |
98 | static char *lacp_rate = NULL; | |
169a3e66 | 99 | static char *xmit_hash_policy = NULL; |
1da177e4 LT |
100 | static int arp_interval = BOND_LINK_ARP_INTERV; |
101 | static char *arp_ip_target[BOND_MAX_ARP_TARGETS] = { NULL, }; | |
f5b2b966 | 102 | static char *arp_validate = NULL; |
3915c1e8 | 103 | static char *fail_over_mac = NULL; |
12479f9a | 104 | struct bond_params bonding_defaults; |
1da177e4 LT |
105 | |
106 | module_param(max_bonds, int, 0); | |
107 | MODULE_PARM_DESC(max_bonds, "Max number of bonded devices"); | |
7893b249 MS |
108 | module_param(num_grat_arp, int, 0644); |
109 | MODULE_PARM_DESC(num_grat_arp, "Number of gratuitous ARP packets to send on failover event"); | |
1da177e4 LT |
110 | module_param(miimon, int, 0); |
111 | MODULE_PARM_DESC(miimon, "Link check interval in milliseconds"); | |
112 | module_param(updelay, int, 0); | |
113 | MODULE_PARM_DESC(updelay, "Delay before considering link up, in milliseconds"); | |
114 | module_param(downdelay, int, 0); | |
2ac47660 MW |
115 | MODULE_PARM_DESC(downdelay, "Delay before considering link down, " |
116 | "in milliseconds"); | |
1da177e4 | 117 | module_param(use_carrier, int, 0); |
2ac47660 MW |
118 | MODULE_PARM_DESC(use_carrier, "Use netif_carrier_ok (vs MII ioctls) in miimon; " |
119 | "0 for off, 1 for on (default)"); | |
1da177e4 | 120 | module_param(mode, charp, 0); |
2ac47660 MW |
121 | MODULE_PARM_DESC(mode, "Mode of operation : 0 for balance-rr, " |
122 | "1 for active-backup, 2 for balance-xor, " | |
123 | "3 for broadcast, 4 for 802.3ad, 5 for balance-tlb, " | |
124 | "6 for balance-alb"); | |
1da177e4 LT |
125 | module_param(primary, charp, 0); |
126 | MODULE_PARM_DESC(primary, "Primary network device to use"); | |
127 | module_param(lacp_rate, charp, 0); | |
2ac47660 MW |
128 | MODULE_PARM_DESC(lacp_rate, "LACPDU tx rate to request from 802.3ad partner " |
129 | "(slow/fast)"); | |
169a3e66 | 130 | module_param(xmit_hash_policy, charp, 0); |
2ac47660 MW |
131 | MODULE_PARM_DESC(xmit_hash_policy, "XOR hashing method: 0 for layer 2 (default)" |
132 | ", 1 for layer 3+4"); | |
1da177e4 LT |
133 | module_param(arp_interval, int, 0); |
134 | MODULE_PARM_DESC(arp_interval, "arp interval in milliseconds"); | |
135 | module_param_array(arp_ip_target, charp, NULL, 0); | |
136 | MODULE_PARM_DESC(arp_ip_target, "arp targets in n.n.n.n form"); | |
f5b2b966 JV |
137 | module_param(arp_validate, charp, 0); |
138 | MODULE_PARM_DESC(arp_validate, "validate src/dst of ARP probes: none (default), active, backup or all"); | |
3915c1e8 JV |
139 | module_param(fail_over_mac, charp, 0); |
140 | MODULE_PARM_DESC(fail_over_mac, "For active-backup, do not set all slaves to the same MAC. none (default), active or follow"); | |
1da177e4 LT |
141 | |
142 | /*----------------------------- Global variables ----------------------------*/ | |
143 | ||
f71e1309 | 144 | static const char * const version = |
1da177e4 LT |
145 | DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"; |
146 | ||
12479f9a | 147 | LIST_HEAD(bond_dev_list); |
1da177e4 LT |
148 | |
149 | #ifdef CONFIG_PROC_FS | |
150 | static struct proc_dir_entry *bond_proc_dir = NULL; | |
151 | #endif | |
152 | ||
b76cdba9 | 153 | extern struct rw_semaphore bonding_rwsem; |
d3bb52b0 | 154 | static __be32 arp_target[BOND_MAX_ARP_TARGETS] = { 0, } ; |
1da177e4 | 155 | static int arp_ip_count = 0; |
1da177e4 | 156 | static int bond_mode = BOND_MODE_ROUNDROBIN; |
169a3e66 | 157 | static int xmit_hashtype= BOND_XMIT_POLICY_LAYER2; |
1da177e4 | 158 | static int lacp_fast = 0; |
217df670 | 159 | |
1da177e4 | 160 | |
12479f9a | 161 | struct bond_parm_tbl bond_lacp_tbl[] = { |
1da177e4 LT |
162 | { "slow", AD_LACP_SLOW}, |
163 | { "fast", AD_LACP_FAST}, | |
164 | { NULL, -1}, | |
165 | }; | |
166 | ||
12479f9a | 167 | struct bond_parm_tbl bond_mode_tbl[] = { |
1da177e4 LT |
168 | { "balance-rr", BOND_MODE_ROUNDROBIN}, |
169 | { "active-backup", BOND_MODE_ACTIVEBACKUP}, | |
170 | { "balance-xor", BOND_MODE_XOR}, | |
171 | { "broadcast", BOND_MODE_BROADCAST}, | |
172 | { "802.3ad", BOND_MODE_8023AD}, | |
173 | { "balance-tlb", BOND_MODE_TLB}, | |
174 | { "balance-alb", BOND_MODE_ALB}, | |
175 | { NULL, -1}, | |
176 | }; | |
177 | ||
12479f9a | 178 | struct bond_parm_tbl xmit_hashtype_tbl[] = { |
169a3e66 JV |
179 | { "layer2", BOND_XMIT_POLICY_LAYER2}, |
180 | { "layer3+4", BOND_XMIT_POLICY_LAYER34}, | |
6f6652be | 181 | { "layer2+3", BOND_XMIT_POLICY_LAYER23}, |
169a3e66 JV |
182 | { NULL, -1}, |
183 | }; | |
184 | ||
f5b2b966 JV |
185 | struct bond_parm_tbl arp_validate_tbl[] = { |
186 | { "none", BOND_ARP_VALIDATE_NONE}, | |
187 | { "active", BOND_ARP_VALIDATE_ACTIVE}, | |
188 | { "backup", BOND_ARP_VALIDATE_BACKUP}, | |
189 | { "all", BOND_ARP_VALIDATE_ALL}, | |
190 | { NULL, -1}, | |
191 | }; | |
192 | ||
3915c1e8 JV |
193 | struct bond_parm_tbl fail_over_mac_tbl[] = { |
194 | { "none", BOND_FOM_NONE}, | |
195 | { "active", BOND_FOM_ACTIVE}, | |
196 | { "follow", BOND_FOM_FOLLOW}, | |
197 | { NULL, -1}, | |
198 | }; | |
199 | ||
1da177e4 LT |
200 | /*-------------------------- Forward declarations ---------------------------*/ |
201 | ||
c3ade5ca | 202 | static void bond_send_gratuitous_arp(struct bonding *bond); |
c50b85d0 | 203 | static void bond_deinit(struct net_device *bond_dev); |
1da177e4 LT |
204 | |
205 | /*---------------------------- General routines -----------------------------*/ | |
206 | ||
4ad072c9 | 207 | static const char *bond_mode_name(int mode) |
1da177e4 LT |
208 | { |
209 | switch (mode) { | |
210 | case BOND_MODE_ROUNDROBIN : | |
211 | return "load balancing (round-robin)"; | |
212 | case BOND_MODE_ACTIVEBACKUP : | |
213 | return "fault-tolerance (active-backup)"; | |
214 | case BOND_MODE_XOR : | |
215 | return "load balancing (xor)"; | |
216 | case BOND_MODE_BROADCAST : | |
217 | return "fault-tolerance (broadcast)"; | |
218 | case BOND_MODE_8023AD: | |
219 | return "IEEE 802.3ad Dynamic link aggregation"; | |
220 | case BOND_MODE_TLB: | |
221 | return "transmit load balancing"; | |
222 | case BOND_MODE_ALB: | |
223 | return "adaptive load balancing"; | |
224 | default: | |
225 | return "unknown"; | |
226 | } | |
227 | } | |
228 | ||
229 | /*---------------------------------- VLAN -----------------------------------*/ | |
230 | ||
231 | /** | |
232 | * bond_add_vlan - add a new vlan id on bond | |
233 | * @bond: bond that got the notification | |
234 | * @vlan_id: the vlan id to add | |
235 | * | |
236 | * Returns -ENOMEM if allocation failed. | |
237 | */ | |
238 | static int bond_add_vlan(struct bonding *bond, unsigned short vlan_id) | |
239 | { | |
240 | struct vlan_entry *vlan; | |
241 | ||
242 | dprintk("bond: %s, vlan id %d\n", | |
243 | (bond ? bond->dev->name: "None"), vlan_id); | |
244 | ||
245 | vlan = kmalloc(sizeof(struct vlan_entry), GFP_KERNEL); | |
246 | if (!vlan) { | |
247 | return -ENOMEM; | |
248 | } | |
249 | ||
250 | INIT_LIST_HEAD(&vlan->vlan_list); | |
251 | vlan->vlan_id = vlan_id; | |
c3ade5ca | 252 | vlan->vlan_ip = 0; |
1da177e4 LT |
253 | |
254 | write_lock_bh(&bond->lock); | |
255 | ||
256 | list_add_tail(&vlan->vlan_list, &bond->vlan_list); | |
257 | ||
258 | write_unlock_bh(&bond->lock); | |
259 | ||
260 | dprintk("added VLAN ID %d on bond %s\n", vlan_id, bond->dev->name); | |
261 | ||
262 | return 0; | |
263 | } | |
264 | ||
265 | /** | |
266 | * bond_del_vlan - delete a vlan id from bond | |
267 | * @bond: bond that got the notification | |
268 | * @vlan_id: the vlan id to delete | |
269 | * | |
270 | * returns -ENODEV if @vlan_id was not found in @bond. | |
271 | */ | |
272 | static int bond_del_vlan(struct bonding *bond, unsigned short vlan_id) | |
273 | { | |
0883beca | 274 | struct vlan_entry *vlan; |
1da177e4 LT |
275 | int res = -ENODEV; |
276 | ||
277 | dprintk("bond: %s, vlan id %d\n", bond->dev->name, vlan_id); | |
278 | ||
279 | write_lock_bh(&bond->lock); | |
280 | ||
0883beca | 281 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
1da177e4 LT |
282 | if (vlan->vlan_id == vlan_id) { |
283 | list_del(&vlan->vlan_list); | |
284 | ||
285 | if ((bond->params.mode == BOND_MODE_TLB) || | |
286 | (bond->params.mode == BOND_MODE_ALB)) { | |
287 | bond_alb_clear_vlan(bond, vlan_id); | |
288 | } | |
289 | ||
290 | dprintk("removed VLAN ID %d from bond %s\n", vlan_id, | |
291 | bond->dev->name); | |
292 | ||
293 | kfree(vlan); | |
294 | ||
295 | if (list_empty(&bond->vlan_list) && | |
296 | (bond->slave_cnt == 0)) { | |
297 | /* Last VLAN removed and no slaves, so | |
298 | * restore block on adding VLANs. This will | |
299 | * be removed once new slaves that are not | |
300 | * VLAN challenged will be added. | |
301 | */ | |
302 | bond->dev->features |= NETIF_F_VLAN_CHALLENGED; | |
303 | } | |
304 | ||
305 | res = 0; | |
306 | goto out; | |
307 | } | |
308 | } | |
309 | ||
310 | dprintk("couldn't find VLAN ID %d in bond %s\n", vlan_id, | |
311 | bond->dev->name); | |
312 | ||
313 | out: | |
314 | write_unlock_bh(&bond->lock); | |
315 | return res; | |
316 | } | |
317 | ||
318 | /** | |
319 | * bond_has_challenged_slaves | |
320 | * @bond: the bond we're working on | |
321 | * | |
322 | * Searches the slave list. Returns 1 if a vlan challenged slave | |
323 | * was found, 0 otherwise. | |
324 | * | |
325 | * Assumes bond->lock is held. | |
326 | */ | |
327 | static int bond_has_challenged_slaves(struct bonding *bond) | |
328 | { | |
329 | struct slave *slave; | |
330 | int i; | |
331 | ||
332 | bond_for_each_slave(bond, slave, i) { | |
333 | if (slave->dev->features & NETIF_F_VLAN_CHALLENGED) { | |
334 | dprintk("found VLAN challenged slave - %s\n", | |
335 | slave->dev->name); | |
336 | return 1; | |
337 | } | |
338 | } | |
339 | ||
340 | dprintk("no VLAN challenged slaves found\n"); | |
341 | return 0; | |
342 | } | |
343 | ||
344 | /** | |
345 | * bond_next_vlan - safely skip to the next item in the vlans list. | |
346 | * @bond: the bond we're working on | |
347 | * @curr: item we're advancing from | |
348 | * | |
349 | * Returns %NULL if list is empty, bond->next_vlan if @curr is %NULL, | |
350 | * or @curr->next otherwise (even if it is @curr itself again). | |
351 | * | |
352 | * Caller must hold bond->lock | |
353 | */ | |
354 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr) | |
355 | { | |
356 | struct vlan_entry *next, *last; | |
357 | ||
358 | if (list_empty(&bond->vlan_list)) { | |
359 | return NULL; | |
360 | } | |
361 | ||
362 | if (!curr) { | |
363 | next = list_entry(bond->vlan_list.next, | |
364 | struct vlan_entry, vlan_list); | |
365 | } else { | |
366 | last = list_entry(bond->vlan_list.prev, | |
367 | struct vlan_entry, vlan_list); | |
368 | if (last == curr) { | |
369 | next = list_entry(bond->vlan_list.next, | |
370 | struct vlan_entry, vlan_list); | |
371 | } else { | |
372 | next = list_entry(curr->vlan_list.next, | |
373 | struct vlan_entry, vlan_list); | |
374 | } | |
375 | } | |
376 | ||
377 | return next; | |
378 | } | |
379 | ||
380 | /** | |
381 | * bond_dev_queue_xmit - Prepare skb for xmit. | |
382 | * | |
383 | * @bond: bond device that got this skb for tx. | |
384 | * @skb: hw accel VLAN tagged skb to transmit | |
385 | * @slave_dev: slave that is supposed to xmit this skbuff | |
386 | * | |
387 | * When the bond gets an skb to transmit that is | |
388 | * already hardware accelerated VLAN tagged, and it | |
389 | * needs to relay this skb to a slave that is not | |
390 | * hw accel capable, the skb needs to be "unaccelerated", | |
391 | * i.e. strip the hwaccel tag and re-insert it as part | |
392 | * of the payload. | |
393 | */ | |
394 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev) | |
395 | { | |
966bc6f4 | 396 | unsigned short uninitialized_var(vlan_id); |
1da177e4 LT |
397 | |
398 | if (!list_empty(&bond->vlan_list) && | |
399 | !(slave_dev->features & NETIF_F_HW_VLAN_TX) && | |
400 | vlan_get_tag(skb, &vlan_id) == 0) { | |
401 | skb->dev = slave_dev; | |
402 | skb = vlan_put_tag(skb, vlan_id); | |
403 | if (!skb) { | |
404 | /* vlan_put_tag() frees the skb in case of error, | |
405 | * so return success here so the calling functions | |
406 | * won't attempt to free is again. | |
407 | */ | |
408 | return 0; | |
409 | } | |
410 | } else { | |
411 | skb->dev = slave_dev; | |
412 | } | |
413 | ||
414 | skb->priority = 1; | |
415 | dev_queue_xmit(skb); | |
416 | ||
417 | return 0; | |
418 | } | |
419 | ||
420 | /* | |
421 | * In the following 3 functions, bond_vlan_rx_register(), bond_vlan_rx_add_vid | |
422 | * and bond_vlan_rx_kill_vid, We don't protect the slave list iteration with a | |
423 | * lock because: | |
424 | * a. This operation is performed in IOCTL context, | |
425 | * b. The operation is protected by the RTNL semaphore in the 8021q code, | |
426 | * c. Holding a lock with BH disabled while directly calling a base driver | |
427 | * entry point is generally a BAD idea. | |
428 | * | |
429 | * The design of synchronization/protection for this operation in the 8021q | |
430 | * module is good for one or more VLAN devices over a single physical device | |
431 | * and cannot be extended for a teaming solution like bonding, so there is a | |
432 | * potential race condition here where a net device from the vlan group might | |
433 | * be referenced (either by a base driver or the 8021q code) while it is being | |
434 | * removed from the system. However, it turns out we're not making matters | |
435 | * worse, and if it works for regular VLAN usage it will work here too. | |
436 | */ | |
437 | ||
438 | /** | |
439 | * bond_vlan_rx_register - Propagates registration to slaves | |
440 | * @bond_dev: bonding net device that got called | |
441 | * @grp: vlan group being registered | |
442 | */ | |
443 | static void bond_vlan_rx_register(struct net_device *bond_dev, struct vlan_group *grp) | |
444 | { | |
445 | struct bonding *bond = bond_dev->priv; | |
446 | struct slave *slave; | |
447 | int i; | |
448 | ||
449 | bond->vlgrp = grp; | |
450 | ||
451 | bond_for_each_slave(bond, slave, i) { | |
452 | struct net_device *slave_dev = slave->dev; | |
453 | ||
454 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
455 | slave_dev->vlan_rx_register) { | |
456 | slave_dev->vlan_rx_register(slave_dev, grp); | |
457 | } | |
458 | } | |
459 | } | |
460 | ||
461 | /** | |
462 | * bond_vlan_rx_add_vid - Propagates adding an id to slaves | |
463 | * @bond_dev: bonding net device that got called | |
464 | * @vid: vlan id being added | |
465 | */ | |
466 | static void bond_vlan_rx_add_vid(struct net_device *bond_dev, uint16_t vid) | |
467 | { | |
468 | struct bonding *bond = bond_dev->priv; | |
469 | struct slave *slave; | |
470 | int i, res; | |
471 | ||
472 | bond_for_each_slave(bond, slave, i) { | |
473 | struct net_device *slave_dev = slave->dev; | |
474 | ||
475 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
476 | slave_dev->vlan_rx_add_vid) { | |
477 | slave_dev->vlan_rx_add_vid(slave_dev, vid); | |
478 | } | |
479 | } | |
480 | ||
481 | res = bond_add_vlan(bond, vid); | |
482 | if (res) { | |
483 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 484 | ": %s: Error: Failed to add vlan id %d\n", |
1da177e4 LT |
485 | bond_dev->name, vid); |
486 | } | |
487 | } | |
488 | ||
489 | /** | |
490 | * bond_vlan_rx_kill_vid - Propagates deleting an id to slaves | |
491 | * @bond_dev: bonding net device that got called | |
492 | * @vid: vlan id being removed | |
493 | */ | |
494 | static void bond_vlan_rx_kill_vid(struct net_device *bond_dev, uint16_t vid) | |
495 | { | |
496 | struct bonding *bond = bond_dev->priv; | |
497 | struct slave *slave; | |
498 | struct net_device *vlan_dev; | |
499 | int i, res; | |
500 | ||
501 | bond_for_each_slave(bond, slave, i) { | |
502 | struct net_device *slave_dev = slave->dev; | |
503 | ||
504 | if ((slave_dev->features & NETIF_F_HW_VLAN_FILTER) && | |
505 | slave_dev->vlan_rx_kill_vid) { | |
506 | /* Save and then restore vlan_dev in the grp array, | |
507 | * since the slave's driver might clear it. | |
508 | */ | |
5c15bdec | 509 | vlan_dev = vlan_group_get_device(bond->vlgrp, vid); |
1da177e4 | 510 | slave_dev->vlan_rx_kill_vid(slave_dev, vid); |
5c15bdec | 511 | vlan_group_set_device(bond->vlgrp, vid, vlan_dev); |
1da177e4 LT |
512 | } |
513 | } | |
514 | ||
515 | res = bond_del_vlan(bond, vid); | |
516 | if (res) { | |
517 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 518 | ": %s: Error: Failed to remove vlan id %d\n", |
1da177e4 LT |
519 | bond_dev->name, vid); |
520 | } | |
521 | } | |
522 | ||
523 | static void bond_add_vlans_on_slave(struct bonding *bond, struct net_device *slave_dev) | |
524 | { | |
525 | struct vlan_entry *vlan; | |
526 | ||
527 | write_lock_bh(&bond->lock); | |
528 | ||
529 | if (list_empty(&bond->vlan_list)) { | |
530 | goto out; | |
531 | } | |
532 | ||
533 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
534 | slave_dev->vlan_rx_register) { | |
535 | slave_dev->vlan_rx_register(slave_dev, bond->vlgrp); | |
536 | } | |
537 | ||
538 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
539 | !(slave_dev->vlan_rx_add_vid)) { | |
540 | goto out; | |
541 | } | |
542 | ||
543 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
544 | slave_dev->vlan_rx_add_vid(slave_dev, vlan->vlan_id); | |
545 | } | |
546 | ||
547 | out: | |
548 | write_unlock_bh(&bond->lock); | |
549 | } | |
550 | ||
551 | static void bond_del_vlans_from_slave(struct bonding *bond, struct net_device *slave_dev) | |
552 | { | |
553 | struct vlan_entry *vlan; | |
554 | struct net_device *vlan_dev; | |
555 | ||
556 | write_lock_bh(&bond->lock); | |
557 | ||
558 | if (list_empty(&bond->vlan_list)) { | |
559 | goto out; | |
560 | } | |
561 | ||
562 | if (!(slave_dev->features & NETIF_F_HW_VLAN_FILTER) || | |
563 | !(slave_dev->vlan_rx_kill_vid)) { | |
564 | goto unreg; | |
565 | } | |
566 | ||
567 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
568 | /* Save and then restore vlan_dev in the grp array, | |
569 | * since the slave's driver might clear it. | |
570 | */ | |
5c15bdec | 571 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
1da177e4 | 572 | slave_dev->vlan_rx_kill_vid(slave_dev, vlan->vlan_id); |
5c15bdec | 573 | vlan_group_set_device(bond->vlgrp, vlan->vlan_id, vlan_dev); |
1da177e4 LT |
574 | } |
575 | ||
576 | unreg: | |
577 | if ((slave_dev->features & NETIF_F_HW_VLAN_RX) && | |
578 | slave_dev->vlan_rx_register) { | |
579 | slave_dev->vlan_rx_register(slave_dev, NULL); | |
580 | } | |
581 | ||
582 | out: | |
583 | write_unlock_bh(&bond->lock); | |
584 | } | |
585 | ||
586 | /*------------------------------- Link status -------------------------------*/ | |
587 | ||
ff59c456 JV |
588 | /* |
589 | * Set the carrier state for the master according to the state of its | |
590 | * slaves. If any slaves are up, the master is up. In 802.3ad mode, | |
591 | * do special 802.3ad magic. | |
592 | * | |
593 | * Returns zero if carrier state does not change, nonzero if it does. | |
594 | */ | |
595 | static int bond_set_carrier(struct bonding *bond) | |
596 | { | |
597 | struct slave *slave; | |
598 | int i; | |
599 | ||
600 | if (bond->slave_cnt == 0) | |
601 | goto down; | |
602 | ||
603 | if (bond->params.mode == BOND_MODE_8023AD) | |
604 | return bond_3ad_set_carrier(bond); | |
605 | ||
606 | bond_for_each_slave(bond, slave, i) { | |
607 | if (slave->link == BOND_LINK_UP) { | |
608 | if (!netif_carrier_ok(bond->dev)) { | |
609 | netif_carrier_on(bond->dev); | |
610 | return 1; | |
611 | } | |
612 | return 0; | |
613 | } | |
614 | } | |
615 | ||
616 | down: | |
617 | if (netif_carrier_ok(bond->dev)) { | |
618 | netif_carrier_off(bond->dev); | |
619 | return 1; | |
620 | } | |
621 | return 0; | |
622 | } | |
623 | ||
1da177e4 LT |
624 | /* |
625 | * Get link speed and duplex from the slave's base driver | |
626 | * using ethtool. If for some reason the call fails or the | |
627 | * values are invalid, fake speed and duplex to 100/Full | |
628 | * and return error. | |
629 | */ | |
630 | static int bond_update_speed_duplex(struct slave *slave) | |
631 | { | |
632 | struct net_device *slave_dev = slave->dev; | |
1da177e4 | 633 | struct ethtool_cmd etool; |
61a44b9c | 634 | int res; |
1da177e4 LT |
635 | |
636 | /* Fake speed and duplex */ | |
637 | slave->speed = SPEED_100; | |
638 | slave->duplex = DUPLEX_FULL; | |
639 | ||
61a44b9c MW |
640 | if (!slave_dev->ethtool_ops || !slave_dev->ethtool_ops->get_settings) |
641 | return -1; | |
1da177e4 | 642 | |
61a44b9c MW |
643 | res = slave_dev->ethtool_ops->get_settings(slave_dev, &etool); |
644 | if (res < 0) | |
1da177e4 | 645 | return -1; |
1da177e4 | 646 | |
1da177e4 LT |
647 | switch (etool.speed) { |
648 | case SPEED_10: | |
649 | case SPEED_100: | |
650 | case SPEED_1000: | |
94dbffd5 | 651 | case SPEED_10000: |
1da177e4 LT |
652 | break; |
653 | default: | |
654 | return -1; | |
655 | } | |
656 | ||
657 | switch (etool.duplex) { | |
658 | case DUPLEX_FULL: | |
659 | case DUPLEX_HALF: | |
660 | break; | |
661 | default: | |
662 | return -1; | |
663 | } | |
664 | ||
665 | slave->speed = etool.speed; | |
666 | slave->duplex = etool.duplex; | |
667 | ||
668 | return 0; | |
669 | } | |
670 | ||
671 | /* | |
672 | * if <dev> supports MII link status reporting, check its link status. | |
673 | * | |
674 | * We either do MII/ETHTOOL ioctls, or check netif_carrier_ok(), | |
675 | * depening upon the setting of the use_carrier parameter. | |
676 | * | |
677 | * Return either BMSR_LSTATUS, meaning that the link is up (or we | |
678 | * can't tell and just pretend it is), or 0, meaning that the link is | |
679 | * down. | |
680 | * | |
681 | * If reporting is non-zero, instead of faking link up, return -1 if | |
682 | * both ETHTOOL and MII ioctls fail (meaning the device does not | |
683 | * support them). If use_carrier is set, return whatever it says. | |
684 | * It'd be nice if there was a good way to tell if a driver supports | |
685 | * netif_carrier, but there really isn't. | |
686 | */ | |
687 | static int bond_check_dev_link(struct bonding *bond, struct net_device *slave_dev, int reporting) | |
688 | { | |
689 | static int (* ioctl)(struct net_device *, struct ifreq *, int); | |
690 | struct ifreq ifr; | |
691 | struct mii_ioctl_data *mii; | |
1da177e4 LT |
692 | |
693 | if (bond->params.use_carrier) { | |
694 | return netif_carrier_ok(slave_dev) ? BMSR_LSTATUS : 0; | |
695 | } | |
696 | ||
697 | ioctl = slave_dev->do_ioctl; | |
698 | if (ioctl) { | |
699 | /* TODO: set pointer to correct ioctl on a per team member */ | |
700 | /* bases to make this more efficient. that is, once */ | |
701 | /* we determine the correct ioctl, we will always */ | |
702 | /* call it and not the others for that team */ | |
703 | /* member. */ | |
704 | ||
705 | /* | |
706 | * We cannot assume that SIOCGMIIPHY will also read a | |
707 | * register; not all network drivers (e.g., e100) | |
708 | * support that. | |
709 | */ | |
710 | ||
711 | /* Yes, the mii is overlaid on the ifreq.ifr_ifru */ | |
712 | strncpy(ifr.ifr_name, slave_dev->name, IFNAMSIZ); | |
713 | mii = if_mii(&ifr); | |
714 | if (IOCTL(slave_dev, &ifr, SIOCGMIIPHY) == 0) { | |
715 | mii->reg_num = MII_BMSR; | |
716 | if (IOCTL(slave_dev, &ifr, SIOCGMIIREG) == 0) { | |
717 | return (mii->val_out & BMSR_LSTATUS); | |
718 | } | |
719 | } | |
720 | } | |
721 | ||
61a44b9c MW |
722 | /* |
723 | * Some drivers cache ETHTOOL_GLINK for a period of time so we only | |
724 | * attempt to get link status from it if the above MII ioctls fail. | |
725 | */ | |
1da177e4 LT |
726 | if (slave_dev->ethtool_ops) { |
727 | if (slave_dev->ethtool_ops->get_link) { | |
728 | u32 link; | |
729 | ||
730 | link = slave_dev->ethtool_ops->get_link(slave_dev); | |
731 | ||
732 | return link ? BMSR_LSTATUS : 0; | |
733 | } | |
734 | } | |
735 | ||
1da177e4 LT |
736 | /* |
737 | * If reporting, report that either there's no dev->do_ioctl, | |
61a44b9c | 738 | * or both SIOCGMIIREG and get_link failed (meaning that we |
1da177e4 LT |
739 | * cannot report link status). If not reporting, pretend |
740 | * we're ok. | |
741 | */ | |
742 | return (reporting ? -1 : BMSR_LSTATUS); | |
743 | } | |
744 | ||
745 | /*----------------------------- Multicast list ------------------------------*/ | |
746 | ||
747 | /* | |
748 | * Returns 0 if dmi1 and dmi2 are the same, non-0 otherwise | |
749 | */ | |
750 | static inline int bond_is_dmi_same(struct dev_mc_list *dmi1, struct dev_mc_list *dmi2) | |
751 | { | |
752 | return memcmp(dmi1->dmi_addr, dmi2->dmi_addr, dmi1->dmi_addrlen) == 0 && | |
753 | dmi1->dmi_addrlen == dmi2->dmi_addrlen; | |
754 | } | |
755 | ||
756 | /* | |
757 | * returns dmi entry if found, NULL otherwise | |
758 | */ | |
759 | static struct dev_mc_list *bond_mc_list_find_dmi(struct dev_mc_list *dmi, struct dev_mc_list *mc_list) | |
760 | { | |
761 | struct dev_mc_list *idmi; | |
762 | ||
763 | for (idmi = mc_list; idmi; idmi = idmi->next) { | |
764 | if (bond_is_dmi_same(dmi, idmi)) { | |
765 | return idmi; | |
766 | } | |
767 | } | |
768 | ||
769 | return NULL; | |
770 | } | |
771 | ||
772 | /* | |
773 | * Push the promiscuity flag down to appropriate slaves | |
774 | */ | |
775 | static void bond_set_promiscuity(struct bonding *bond, int inc) | |
776 | { | |
777 | if (USES_PRIMARY(bond->params.mode)) { | |
778 | /* write lock already acquired */ | |
779 | if (bond->curr_active_slave) { | |
780 | dev_set_promiscuity(bond->curr_active_slave->dev, inc); | |
781 | } | |
782 | } else { | |
783 | struct slave *slave; | |
784 | int i; | |
785 | bond_for_each_slave(bond, slave, i) { | |
786 | dev_set_promiscuity(slave->dev, inc); | |
787 | } | |
788 | } | |
789 | } | |
790 | ||
791 | /* | |
792 | * Push the allmulti flag down to all slaves | |
793 | */ | |
794 | static void bond_set_allmulti(struct bonding *bond, int inc) | |
795 | { | |
796 | if (USES_PRIMARY(bond->params.mode)) { | |
797 | /* write lock already acquired */ | |
798 | if (bond->curr_active_slave) { | |
799 | dev_set_allmulti(bond->curr_active_slave->dev, inc); | |
800 | } | |
801 | } else { | |
802 | struct slave *slave; | |
803 | int i; | |
804 | bond_for_each_slave(bond, slave, i) { | |
805 | dev_set_allmulti(slave->dev, inc); | |
806 | } | |
807 | } | |
808 | } | |
809 | ||
810 | /* | |
811 | * Add a Multicast address to slaves | |
812 | * according to mode | |
813 | */ | |
814 | static void bond_mc_add(struct bonding *bond, void *addr, int alen) | |
815 | { | |
816 | if (USES_PRIMARY(bond->params.mode)) { | |
817 | /* write lock already acquired */ | |
818 | if (bond->curr_active_slave) { | |
819 | dev_mc_add(bond->curr_active_slave->dev, addr, alen, 0); | |
820 | } | |
821 | } else { | |
822 | struct slave *slave; | |
823 | int i; | |
824 | bond_for_each_slave(bond, slave, i) { | |
825 | dev_mc_add(slave->dev, addr, alen, 0); | |
826 | } | |
827 | } | |
828 | } | |
829 | ||
830 | /* | |
831 | * Remove a multicast address from slave | |
832 | * according to mode | |
833 | */ | |
834 | static void bond_mc_delete(struct bonding *bond, void *addr, int alen) | |
835 | { | |
836 | if (USES_PRIMARY(bond->params.mode)) { | |
837 | /* write lock already acquired */ | |
838 | if (bond->curr_active_slave) { | |
839 | dev_mc_delete(bond->curr_active_slave->dev, addr, alen, 0); | |
840 | } | |
841 | } else { | |
842 | struct slave *slave; | |
843 | int i; | |
844 | bond_for_each_slave(bond, slave, i) { | |
845 | dev_mc_delete(slave->dev, addr, alen, 0); | |
846 | } | |
847 | } | |
848 | } | |
849 | ||
a816c7c7 JV |
850 | |
851 | /* | |
852 | * Retrieve the list of registered multicast addresses for the bonding | |
853 | * device and retransmit an IGMP JOIN request to the current active | |
854 | * slave. | |
855 | */ | |
856 | static void bond_resend_igmp_join_requests(struct bonding *bond) | |
857 | { | |
858 | struct in_device *in_dev; | |
859 | struct ip_mc_list *im; | |
860 | ||
861 | rcu_read_lock(); | |
862 | in_dev = __in_dev_get_rcu(bond->dev); | |
863 | if (in_dev) { | |
864 | for (im = in_dev->mc_list; im; im = im->next) { | |
865 | ip_mc_rejoin_group(im); | |
866 | } | |
867 | } | |
868 | ||
869 | rcu_read_unlock(); | |
870 | } | |
871 | ||
1da177e4 LT |
872 | /* |
873 | * Totally destroys the mc_list in bond | |
874 | */ | |
875 | static void bond_mc_list_destroy(struct bonding *bond) | |
876 | { | |
877 | struct dev_mc_list *dmi; | |
878 | ||
879 | dmi = bond->mc_list; | |
880 | while (dmi) { | |
881 | bond->mc_list = dmi->next; | |
882 | kfree(dmi); | |
883 | dmi = bond->mc_list; | |
884 | } | |
a816c7c7 | 885 | bond->mc_list = NULL; |
1da177e4 LT |
886 | } |
887 | ||
888 | /* | |
889 | * Copy all the Multicast addresses from src to the bonding device dst | |
890 | */ | |
de54f390 | 891 | static int bond_mc_list_copy(struct dev_mc_list *mc_list, struct bonding *bond, |
dd0fc66f | 892 | gfp_t gfp_flag) |
1da177e4 LT |
893 | { |
894 | struct dev_mc_list *dmi, *new_dmi; | |
895 | ||
896 | for (dmi = mc_list; dmi; dmi = dmi->next) { | |
de54f390 | 897 | new_dmi = kmalloc(sizeof(struct dev_mc_list), gfp_flag); |
1da177e4 LT |
898 | |
899 | if (!new_dmi) { | |
900 | /* FIXME: Potential memory leak !!! */ | |
901 | return -ENOMEM; | |
902 | } | |
903 | ||
904 | new_dmi->next = bond->mc_list; | |
905 | bond->mc_list = new_dmi; | |
906 | new_dmi->dmi_addrlen = dmi->dmi_addrlen; | |
907 | memcpy(new_dmi->dmi_addr, dmi->dmi_addr, dmi->dmi_addrlen); | |
908 | new_dmi->dmi_users = dmi->dmi_users; | |
909 | new_dmi->dmi_gusers = dmi->dmi_gusers; | |
910 | } | |
911 | ||
912 | return 0; | |
913 | } | |
914 | ||
915 | /* | |
916 | * flush all members of flush->mc_list from device dev->mc_list | |
917 | */ | |
918 | static void bond_mc_list_flush(struct net_device *bond_dev, struct net_device *slave_dev) | |
919 | { | |
920 | struct bonding *bond = bond_dev->priv; | |
921 | struct dev_mc_list *dmi; | |
922 | ||
923 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
924 | dev_mc_delete(slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
925 | } | |
926 | ||
927 | if (bond->params.mode == BOND_MODE_8023AD) { | |
928 | /* del lacpdu mc addr from mc list */ | |
929 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
930 | ||
931 | dev_mc_delete(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
932 | } | |
933 | } | |
934 | ||
935 | /*--------------------------- Active slave change ---------------------------*/ | |
936 | ||
937 | /* | |
938 | * Update the mc list and multicast-related flags for the new and | |
939 | * old active slaves (if any) according to the multicast mode, and | |
940 | * promiscuous flags unconditionally. | |
941 | */ | |
942 | static void bond_mc_swap(struct bonding *bond, struct slave *new_active, struct slave *old_active) | |
943 | { | |
944 | struct dev_mc_list *dmi; | |
945 | ||
946 | if (!USES_PRIMARY(bond->params.mode)) { | |
947 | /* nothing to do - mc list is already up-to-date on | |
948 | * all slaves | |
949 | */ | |
950 | return; | |
951 | } | |
952 | ||
953 | if (old_active) { | |
954 | if (bond->dev->flags & IFF_PROMISC) { | |
955 | dev_set_promiscuity(old_active->dev, -1); | |
956 | } | |
957 | ||
958 | if (bond->dev->flags & IFF_ALLMULTI) { | |
959 | dev_set_allmulti(old_active->dev, -1); | |
960 | } | |
961 | ||
962 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
963 | dev_mc_delete(old_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
964 | } | |
965 | } | |
966 | ||
967 | if (new_active) { | |
968 | if (bond->dev->flags & IFF_PROMISC) { | |
969 | dev_set_promiscuity(new_active->dev, 1); | |
970 | } | |
971 | ||
972 | if (bond->dev->flags & IFF_ALLMULTI) { | |
973 | dev_set_allmulti(new_active->dev, 1); | |
974 | } | |
975 | ||
976 | for (dmi = bond->dev->mc_list; dmi; dmi = dmi->next) { | |
977 | dev_mc_add(new_active->dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
978 | } | |
a816c7c7 | 979 | bond_resend_igmp_join_requests(bond); |
1da177e4 LT |
980 | } |
981 | } | |
982 | ||
3915c1e8 JV |
983 | /* |
984 | * bond_do_fail_over_mac | |
985 | * | |
986 | * Perform special MAC address swapping for fail_over_mac settings | |
987 | * | |
988 | * Called with RTNL, bond->lock for read, curr_slave_lock for write_bh. | |
989 | */ | |
990 | static void bond_do_fail_over_mac(struct bonding *bond, | |
991 | struct slave *new_active, | |
992 | struct slave *old_active) | |
993 | { | |
994 | u8 tmp_mac[ETH_ALEN]; | |
995 | struct sockaddr saddr; | |
996 | int rv; | |
997 | ||
998 | switch (bond->params.fail_over_mac) { | |
999 | case BOND_FOM_ACTIVE: | |
1000 | if (new_active) | |
1001 | memcpy(bond->dev->dev_addr, new_active->dev->dev_addr, | |
1002 | new_active->dev->addr_len); | |
1003 | break; | |
1004 | case BOND_FOM_FOLLOW: | |
1005 | /* | |
1006 | * if new_active && old_active, swap them | |
1007 | * if just old_active, do nothing (going to no active slave) | |
1008 | * if just new_active, set new_active to bond's MAC | |
1009 | */ | |
1010 | if (!new_active) | |
1011 | return; | |
1012 | ||
1013 | write_unlock_bh(&bond->curr_slave_lock); | |
1014 | read_unlock(&bond->lock); | |
1015 | ||
1016 | if (old_active) { | |
1017 | memcpy(tmp_mac, new_active->dev->dev_addr, ETH_ALEN); | |
1018 | memcpy(saddr.sa_data, old_active->dev->dev_addr, | |
1019 | ETH_ALEN); | |
1020 | saddr.sa_family = new_active->dev->type; | |
1021 | } else { | |
1022 | memcpy(saddr.sa_data, bond->dev->dev_addr, ETH_ALEN); | |
1023 | saddr.sa_family = bond->dev->type; | |
1024 | } | |
1025 | ||
1026 | rv = dev_set_mac_address(new_active->dev, &saddr); | |
1027 | if (rv) { | |
1028 | printk(KERN_ERR DRV_NAME | |
1029 | ": %s: Error %d setting MAC of slave %s\n", | |
1030 | bond->dev->name, -rv, new_active->dev->name); | |
1031 | goto out; | |
1032 | } | |
1033 | ||
1034 | if (!old_active) | |
1035 | goto out; | |
1036 | ||
1037 | memcpy(saddr.sa_data, tmp_mac, ETH_ALEN); | |
1038 | saddr.sa_family = old_active->dev->type; | |
1039 | ||
1040 | rv = dev_set_mac_address(old_active->dev, &saddr); | |
1041 | if (rv) | |
1042 | printk(KERN_ERR DRV_NAME | |
1043 | ": %s: Error %d setting MAC of slave %s\n", | |
1044 | bond->dev->name, -rv, new_active->dev->name); | |
1045 | out: | |
1046 | read_lock(&bond->lock); | |
1047 | write_lock_bh(&bond->curr_slave_lock); | |
1048 | break; | |
1049 | default: | |
1050 | printk(KERN_ERR DRV_NAME | |
1051 | ": %s: bond_do_fail_over_mac impossible: bad policy %d\n", | |
1052 | bond->dev->name, bond->params.fail_over_mac); | |
1053 | break; | |
1054 | } | |
1055 | ||
1056 | } | |
1057 | ||
1058 | ||
1da177e4 LT |
1059 | /** |
1060 | * find_best_interface - select the best available slave to be the active one | |
1061 | * @bond: our bonding struct | |
1062 | * | |
1063 | * Warning: Caller must hold curr_slave_lock for writing. | |
1064 | */ | |
1065 | static struct slave *bond_find_best_slave(struct bonding *bond) | |
1066 | { | |
1067 | struct slave *new_active, *old_active; | |
1068 | struct slave *bestslave = NULL; | |
1069 | int mintime = bond->params.updelay; | |
1070 | int i; | |
1071 | ||
1072 | new_active = old_active = bond->curr_active_slave; | |
1073 | ||
1074 | if (!new_active) { /* there were no active slaves left */ | |
1075 | if (bond->slave_cnt > 0) { /* found one slave */ | |
1076 | new_active = bond->first_slave; | |
1077 | } else { | |
1078 | return NULL; /* still no slave, return NULL */ | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | /* first try the primary link; if arping, a link must tx/rx traffic | |
1083 | * before it can be considered the curr_active_slave - also, we would skip | |
1084 | * slaves between the curr_active_slave and primary_slave that may be up | |
1085 | * and able to arp | |
1086 | */ | |
1087 | if ((bond->primary_slave) && | |
1088 | (!bond->params.arp_interval) && | |
1089 | (IS_UP(bond->primary_slave->dev))) { | |
1090 | new_active = bond->primary_slave; | |
1091 | } | |
1092 | ||
1093 | /* remember where to stop iterating over the slaves */ | |
1094 | old_active = new_active; | |
1095 | ||
1096 | bond_for_each_slave_from(bond, new_active, i, old_active) { | |
1097 | if (IS_UP(new_active->dev)) { | |
1098 | if (new_active->link == BOND_LINK_UP) { | |
1099 | return new_active; | |
1100 | } else if (new_active->link == BOND_LINK_BACK) { | |
1101 | /* link up, but waiting for stabilization */ | |
1102 | if (new_active->delay < mintime) { | |
1103 | mintime = new_active->delay; | |
1104 | bestslave = new_active; | |
1105 | } | |
1106 | } | |
1107 | } | |
1108 | } | |
1109 | ||
1110 | return bestslave; | |
1111 | } | |
1112 | ||
1113 | /** | |
1114 | * change_active_interface - change the active slave into the specified one | |
1115 | * @bond: our bonding struct | |
1116 | * @new: the new slave to make the active one | |
1117 | * | |
1118 | * Set the new slave to the bond's settings and unset them on the old | |
1119 | * curr_active_slave. | |
1120 | * Setting include flags, mc-list, promiscuity, allmulti, etc. | |
1121 | * | |
1122 | * If @new's link state is %BOND_LINK_BACK we'll set it to %BOND_LINK_UP, | |
1123 | * because it is apparently the best available slave we have, even though its | |
1124 | * updelay hasn't timed out yet. | |
1125 | * | |
3915c1e8 JV |
1126 | * If new_active is not NULL, caller must hold bond->lock for read and |
1127 | * curr_slave_lock for write_bh. | |
1da177e4 | 1128 | */ |
a77b5325 | 1129 | void bond_change_active_slave(struct bonding *bond, struct slave *new_active) |
1da177e4 LT |
1130 | { |
1131 | struct slave *old_active = bond->curr_active_slave; | |
1132 | ||
1133 | if (old_active == new_active) { | |
1134 | return; | |
1135 | } | |
1136 | ||
1137 | if (new_active) { | |
b2220cad JV |
1138 | new_active->jiffies = jiffies; |
1139 | ||
1da177e4 LT |
1140 | if (new_active->link == BOND_LINK_BACK) { |
1141 | if (USES_PRIMARY(bond->params.mode)) { | |
1142 | printk(KERN_INFO DRV_NAME | |
1143 | ": %s: making interface %s the new " | |
1144 | "active one %d ms earlier.\n", | |
1145 | bond->dev->name, new_active->dev->name, | |
1146 | (bond->params.updelay - new_active->delay) * bond->params.miimon); | |
1147 | } | |
1148 | ||
1149 | new_active->delay = 0; | |
1150 | new_active->link = BOND_LINK_UP; | |
1da177e4 LT |
1151 | |
1152 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1153 | bond_3ad_handle_link_change(new_active, BOND_LINK_UP); | |
1154 | } | |
1155 | ||
1156 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1157 | (bond->params.mode == BOND_MODE_ALB)) { | |
1158 | bond_alb_handle_link_change(bond, new_active, BOND_LINK_UP); | |
1159 | } | |
1160 | } else { | |
1161 | if (USES_PRIMARY(bond->params.mode)) { | |
1162 | printk(KERN_INFO DRV_NAME | |
1163 | ": %s: making interface %s the new " | |
1164 | "active one.\n", | |
1165 | bond->dev->name, new_active->dev->name); | |
1166 | } | |
1167 | } | |
1168 | } | |
1169 | ||
1da177e4 LT |
1170 | if (USES_PRIMARY(bond->params.mode)) { |
1171 | bond_mc_swap(bond, new_active, old_active); | |
1172 | } | |
1173 | ||
1174 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1175 | (bond->params.mode == BOND_MODE_ALB)) { | |
1176 | bond_alb_handle_active_change(bond, new_active); | |
8f903c70 JV |
1177 | if (old_active) |
1178 | bond_set_slave_inactive_flags(old_active); | |
1179 | if (new_active) | |
1180 | bond_set_slave_active_flags(new_active); | |
1da177e4 LT |
1181 | } else { |
1182 | bond->curr_active_slave = new_active; | |
1183 | } | |
c3ade5ca JV |
1184 | |
1185 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) { | |
1186 | if (old_active) { | |
1187 | bond_set_slave_inactive_flags(old_active); | |
1188 | } | |
1189 | ||
1190 | if (new_active) { | |
1191 | bond_set_slave_active_flags(new_active); | |
2ab82852 | 1192 | |
709f8a45 OG |
1193 | if (bond->params.fail_over_mac) |
1194 | bond_do_fail_over_mac(bond, new_active, | |
1195 | old_active); | |
3915c1e8 | 1196 | |
709f8a45 | 1197 | bond->send_grat_arp = bond->params.num_grat_arp; |
b59f9f74 | 1198 | bond_send_gratuitous_arp(bond); |
01f3109d OG |
1199 | |
1200 | write_unlock_bh(&bond->curr_slave_lock); | |
1201 | read_unlock(&bond->lock); | |
1202 | ||
1203 | netdev_bonding_change(bond->dev); | |
1204 | ||
1205 | read_lock(&bond->lock); | |
1206 | write_lock_bh(&bond->curr_slave_lock); | |
7893b249 | 1207 | } |
c3ade5ca | 1208 | } |
1da177e4 LT |
1209 | } |
1210 | ||
1211 | /** | |
1212 | * bond_select_active_slave - select a new active slave, if needed | |
1213 | * @bond: our bonding struct | |
1214 | * | |
1215 | * This functions shoud be called when one of the following occurs: | |
1216 | * - The old curr_active_slave has been released or lost its link. | |
1217 | * - The primary_slave has got its link back. | |
1218 | * - A slave has got its link back and there's no old curr_active_slave. | |
1219 | * | |
3915c1e8 | 1220 | * Caller must hold bond->lock for read and curr_slave_lock for write_bh. |
1da177e4 | 1221 | */ |
a77b5325 | 1222 | void bond_select_active_slave(struct bonding *bond) |
1da177e4 LT |
1223 | { |
1224 | struct slave *best_slave; | |
ff59c456 | 1225 | int rv; |
1da177e4 LT |
1226 | |
1227 | best_slave = bond_find_best_slave(bond); | |
1228 | if (best_slave != bond->curr_active_slave) { | |
1229 | bond_change_active_slave(bond, best_slave); | |
ff59c456 JV |
1230 | rv = bond_set_carrier(bond); |
1231 | if (!rv) | |
1232 | return; | |
1233 | ||
1234 | if (netif_carrier_ok(bond->dev)) { | |
1235 | printk(KERN_INFO DRV_NAME | |
1236 | ": %s: first active interface up!\n", | |
1237 | bond->dev->name); | |
1238 | } else { | |
1239 | printk(KERN_INFO DRV_NAME ": %s: " | |
1240 | "now running without any active interface !\n", | |
1241 | bond->dev->name); | |
1242 | } | |
1da177e4 LT |
1243 | } |
1244 | } | |
1245 | ||
1246 | /*--------------------------- slave list handling ---------------------------*/ | |
1247 | ||
1248 | /* | |
1249 | * This function attaches the slave to the end of list. | |
1250 | * | |
1251 | * bond->lock held for writing by caller. | |
1252 | */ | |
1253 | static void bond_attach_slave(struct bonding *bond, struct slave *new_slave) | |
1254 | { | |
1255 | if (bond->first_slave == NULL) { /* attaching the first slave */ | |
1256 | new_slave->next = new_slave; | |
1257 | new_slave->prev = new_slave; | |
1258 | bond->first_slave = new_slave; | |
1259 | } else { | |
1260 | new_slave->next = bond->first_slave; | |
1261 | new_slave->prev = bond->first_slave->prev; | |
1262 | new_slave->next->prev = new_slave; | |
1263 | new_slave->prev->next = new_slave; | |
1264 | } | |
1265 | ||
1266 | bond->slave_cnt++; | |
1267 | } | |
1268 | ||
1269 | /* | |
1270 | * This function detaches the slave from the list. | |
1271 | * WARNING: no check is made to verify if the slave effectively | |
1272 | * belongs to <bond>. | |
1273 | * Nothing is freed on return, structures are just unchained. | |
1274 | * If any slave pointer in bond was pointing to <slave>, | |
1275 | * it should be changed by the calling function. | |
1276 | * | |
1277 | * bond->lock held for writing by caller. | |
1278 | */ | |
1279 | static void bond_detach_slave(struct bonding *bond, struct slave *slave) | |
1280 | { | |
1281 | if (slave->next) { | |
1282 | slave->next->prev = slave->prev; | |
1283 | } | |
1284 | ||
1285 | if (slave->prev) { | |
1286 | slave->prev->next = slave->next; | |
1287 | } | |
1288 | ||
1289 | if (bond->first_slave == slave) { /* slave is the first slave */ | |
1290 | if (bond->slave_cnt > 1) { /* there are more slave */ | |
1291 | bond->first_slave = slave->next; | |
1292 | } else { | |
1293 | bond->first_slave = NULL; /* slave was the last one */ | |
1294 | } | |
1295 | } | |
1296 | ||
1297 | slave->next = NULL; | |
1298 | slave->prev = NULL; | |
1299 | bond->slave_cnt--; | |
1300 | } | |
1301 | ||
1302 | /*---------------------------------- IOCTL ----------------------------------*/ | |
1303 | ||
4ad072c9 AB |
1304 | static int bond_sethwaddr(struct net_device *bond_dev, |
1305 | struct net_device *slave_dev) | |
1da177e4 LT |
1306 | { |
1307 | dprintk("bond_dev=%p\n", bond_dev); | |
1308 | dprintk("slave_dev=%p\n", slave_dev); | |
1309 | dprintk("slave_dev->addr_len=%d\n", slave_dev->addr_len); | |
1310 | memcpy(bond_dev->dev_addr, slave_dev->dev_addr, slave_dev->addr_len); | |
1311 | return 0; | |
1312 | } | |
1313 | ||
7f353bf2 HX |
1314 | #define BOND_VLAN_FEATURES \ |
1315 | (NETIF_F_VLAN_CHALLENGED | NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX | \ | |
1316 | NETIF_F_HW_VLAN_FILTER) | |
8531c5ff AK |
1317 | |
1318 | /* | |
8e3babcd | 1319 | * Compute the common dev->feature set available to all slaves. Some |
7f353bf2 HX |
1320 | * feature bits are managed elsewhere, so preserve those feature bits |
1321 | * on the master device. | |
8531c5ff AK |
1322 | */ |
1323 | static int bond_compute_features(struct bonding *bond) | |
1324 | { | |
8531c5ff AK |
1325 | struct slave *slave; |
1326 | struct net_device *bond_dev = bond->dev; | |
7f353bf2 | 1327 | unsigned long features = bond_dev->features; |
3158bf7d MS |
1328 | unsigned short max_hard_header_len = max((u16)ETH_HLEN, |
1329 | bond_dev->hard_header_len); | |
8e3babcd | 1330 | int i; |
8531c5ff | 1331 | |
7f353bf2 HX |
1332 | features &= ~(NETIF_F_ALL_CSUM | BOND_VLAN_FEATURES); |
1333 | features |= NETIF_F_SG | NETIF_F_FRAGLIST | NETIF_F_HIGHDMA | | |
1334 | NETIF_F_GSO_MASK | NETIF_F_NO_CSUM; | |
1335 | ||
54ef3137 | 1336 | bond_for_each_slave(bond, slave, i) { |
7f353bf2 HX |
1337 | features = netdev_compute_features(features, |
1338 | slave->dev->features); | |
54ef3137 JV |
1339 | if (slave->dev->hard_header_len > max_hard_header_len) |
1340 | max_hard_header_len = slave->dev->hard_header_len; | |
1341 | } | |
8531c5ff | 1342 | |
7f353bf2 | 1343 | features |= (bond_dev->features & BOND_VLAN_FEATURES); |
8531c5ff | 1344 | bond_dev->features = features; |
54ef3137 | 1345 | bond_dev->hard_header_len = max_hard_header_len; |
8531c5ff AK |
1346 | |
1347 | return 0; | |
1348 | } | |
1349 | ||
872254dd MS |
1350 | |
1351 | static void bond_setup_by_slave(struct net_device *bond_dev, | |
1352 | struct net_device *slave_dev) | |
1353 | { | |
d90a162a MS |
1354 | struct bonding *bond = bond_dev->priv; |
1355 | ||
872254dd | 1356 | bond_dev->neigh_setup = slave_dev->neigh_setup; |
1284cd3a | 1357 | bond_dev->header_ops = slave_dev->header_ops; |
872254dd MS |
1358 | |
1359 | bond_dev->type = slave_dev->type; | |
1360 | bond_dev->hard_header_len = slave_dev->hard_header_len; | |
1361 | bond_dev->addr_len = slave_dev->addr_len; | |
1362 | ||
1363 | memcpy(bond_dev->broadcast, slave_dev->broadcast, | |
1364 | slave_dev->addr_len); | |
d90a162a | 1365 | bond->setup_by_slave = 1; |
872254dd MS |
1366 | } |
1367 | ||
1da177e4 | 1368 | /* enslave device <slave> to bond device <master> */ |
a77b5325 | 1369 | int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1370 | { |
1371 | struct bonding *bond = bond_dev->priv; | |
1372 | struct slave *new_slave = NULL; | |
1373 | struct dev_mc_list *dmi; | |
1374 | struct sockaddr addr; | |
1375 | int link_reporting; | |
1376 | int old_features = bond_dev->features; | |
1377 | int res = 0; | |
1378 | ||
552709d5 | 1379 | if (!bond->params.use_carrier && slave_dev->ethtool_ops == NULL && |
1380 | slave_dev->do_ioctl == NULL) { | |
1da177e4 | 1381 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1382 | ": %s: Warning: no link monitoring support for %s\n", |
1383 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1384 | } |
1385 | ||
1386 | /* bond must be initialized by bond_open() before enslaving */ | |
1387 | if (!(bond_dev->flags & IFF_UP)) { | |
6b1bf096 MS |
1388 | printk(KERN_WARNING DRV_NAME |
1389 | " %s: master_dev is not up in bond_enslave\n", | |
1390 | bond_dev->name); | |
1da177e4 LT |
1391 | } |
1392 | ||
1393 | /* already enslaved */ | |
1394 | if (slave_dev->flags & IFF_SLAVE) { | |
1395 | dprintk("Error, Device was already enslaved\n"); | |
1396 | return -EBUSY; | |
1397 | } | |
1398 | ||
1399 | /* vlan challenged mutual exclusion */ | |
1400 | /* no need to lock since we're protected by rtnl_lock */ | |
1401 | if (slave_dev->features & NETIF_F_VLAN_CHALLENGED) { | |
1402 | dprintk("%s: NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1403 | if (!list_empty(&bond->vlan_list)) { | |
1404 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1405 | ": %s: Error: cannot enslave VLAN " |
1da177e4 | 1406 | "challenged slave %s on VLAN enabled " |
4e0952c7 | 1407 | "bond %s\n", bond_dev->name, slave_dev->name, |
1da177e4 LT |
1408 | bond_dev->name); |
1409 | return -EPERM; | |
1410 | } else { | |
1411 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1412 | ": %s: Warning: enslaved VLAN challenged " |
1da177e4 LT |
1413 | "slave %s. Adding VLANs will be blocked as " |
1414 | "long as %s is part of bond %s\n", | |
4e0952c7 | 1415 | bond_dev->name, slave_dev->name, slave_dev->name, |
1da177e4 LT |
1416 | bond_dev->name); |
1417 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1418 | } | |
1419 | } else { | |
1420 | dprintk("%s: ! NETIF_F_VLAN_CHALLENGED\n", slave_dev->name); | |
1421 | if (bond->slave_cnt == 0) { | |
1422 | /* First slave, and it is not VLAN challenged, | |
1423 | * so remove the block of adding VLANs over the bond. | |
1424 | */ | |
1425 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; | |
1426 | } | |
1427 | } | |
1428 | ||
217df670 JV |
1429 | /* |
1430 | * Old ifenslave binaries are no longer supported. These can | |
1431 | * be identified with moderate accurary by the state of the slave: | |
1432 | * the current ifenslave will set the interface down prior to | |
1433 | * enslaving it; the old ifenslave will not. | |
1434 | */ | |
1435 | if ((slave_dev->flags & IFF_UP)) { | |
1436 | printk(KERN_ERR DRV_NAME ": %s is up. " | |
1437 | "This may be due to an out of date ifenslave.\n", | |
1438 | slave_dev->name); | |
1439 | res = -EPERM; | |
1440 | goto err_undo_flags; | |
1441 | } | |
1da177e4 | 1442 | |
872254dd MS |
1443 | /* set bonding device ether type by slave - bonding netdevices are |
1444 | * created with ether_setup, so when the slave type is not ARPHRD_ETHER | |
1445 | * there is a need to override some of the type dependent attribs/funcs. | |
1446 | * | |
1447 | * bond ether type mutual exclusion - don't allow slaves of dissimilar | |
1448 | * ether type (eg ARPHRD_ETHER and ARPHRD_INFINIBAND) share the same bond | |
1449 | */ | |
1450 | if (bond->slave_cnt == 0) { | |
1451 | if (slave_dev->type != ARPHRD_ETHER) | |
1452 | bond_setup_by_slave(bond_dev, slave_dev); | |
1453 | } else if (bond_dev->type != slave_dev->type) { | |
1454 | printk(KERN_ERR DRV_NAME ": %s ether type (%d) is different " | |
1455 | "from other slaves (%d), can not enslave it.\n", | |
1456 | slave_dev->name, | |
1457 | slave_dev->type, bond_dev->type); | |
1458 | res = -EINVAL; | |
1459 | goto err_undo_flags; | |
1460 | } | |
1461 | ||
217df670 | 1462 | if (slave_dev->set_mac_address == NULL) { |
2ab82852 MS |
1463 | if (bond->slave_cnt == 0) { |
1464 | printk(KERN_WARNING DRV_NAME | |
dd957c57 JV |
1465 | ": %s: Warning: The first slave device " |
1466 | "specified does not support setting the MAC " | |
3915c1e8 | 1467 | "address. Setting fail_over_mac to active.", |
dd957c57 | 1468 | bond_dev->name); |
3915c1e8 JV |
1469 | bond->params.fail_over_mac = BOND_FOM_ACTIVE; |
1470 | } else if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { | |
2ab82852 | 1471 | printk(KERN_ERR DRV_NAME |
dd957c57 JV |
1472 | ": %s: Error: The slave device specified " |
1473 | "does not support setting the MAC address, " | |
3915c1e8 | 1474 | "but fail_over_mac is not set to active.\n" |
2ab82852 MS |
1475 | , bond_dev->name); |
1476 | res = -EOPNOTSUPP; | |
1477 | goto err_undo_flags; | |
1478 | } | |
1da177e4 LT |
1479 | } |
1480 | ||
243cb4e5 | 1481 | new_slave = kzalloc(sizeof(struct slave), GFP_KERNEL); |
1da177e4 LT |
1482 | if (!new_slave) { |
1483 | res = -ENOMEM; | |
1484 | goto err_undo_flags; | |
1485 | } | |
1486 | ||
1da177e4 LT |
1487 | /* save slave's original flags before calling |
1488 | * netdev_set_master and dev_open | |
1489 | */ | |
1490 | new_slave->original_flags = slave_dev->flags; | |
1491 | ||
217df670 JV |
1492 | /* |
1493 | * Save slave's original ("permanent") mac address for modes | |
1494 | * that need it, and for restoring it upon release, and then | |
1495 | * set it to the master's address | |
1496 | */ | |
1497 | memcpy(new_slave->perm_hwaddr, slave_dev->dev_addr, ETH_ALEN); | |
1da177e4 | 1498 | |
dd957c57 | 1499 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
1500 | /* |
1501 | * Set slave to master's mac address. The application already | |
1502 | * set the master's mac address to that of the first slave | |
1503 | */ | |
1504 | memcpy(addr.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
1505 | addr.sa_family = slave_dev->type; | |
1506 | res = dev_set_mac_address(slave_dev, &addr); | |
1507 | if (res) { | |
1508 | dprintk("Error %d calling set_mac_address\n", res); | |
1509 | goto err_free; | |
1510 | } | |
217df670 | 1511 | } |
1da177e4 | 1512 | |
c2edacf8 JV |
1513 | res = netdev_set_master(slave_dev, bond_dev); |
1514 | if (res) { | |
1515 | dprintk("Error %d calling netdev_set_master\n", res); | |
569f0c4d | 1516 | goto err_restore_mac; |
c2edacf8 | 1517 | } |
217df670 JV |
1518 | /* open the slave since the application closed it */ |
1519 | res = dev_open(slave_dev); | |
1520 | if (res) { | |
1521 | dprintk("Openning slave %s failed\n", slave_dev->name); | |
569f0c4d | 1522 | goto err_unset_master; |
1da177e4 LT |
1523 | } |
1524 | ||
1da177e4 | 1525 | new_slave->dev = slave_dev; |
0b680e75 | 1526 | slave_dev->priv_flags |= IFF_BONDING; |
1da177e4 LT |
1527 | |
1528 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1529 | (bond->params.mode == BOND_MODE_ALB)) { | |
1530 | /* bond_alb_init_slave() must be called before all other stages since | |
1531 | * it might fail and we do not want to have to undo everything | |
1532 | */ | |
1533 | res = bond_alb_init_slave(bond, new_slave); | |
1534 | if (res) { | |
569f0c4d | 1535 | goto err_close; |
1da177e4 LT |
1536 | } |
1537 | } | |
1538 | ||
1539 | /* If the mode USES_PRIMARY, then the new slave gets the | |
1540 | * master's promisc (and mc) settings only if it becomes the | |
1541 | * curr_active_slave, and that is taken care of later when calling | |
1542 | * bond_change_active() | |
1543 | */ | |
1544 | if (!USES_PRIMARY(bond->params.mode)) { | |
1545 | /* set promiscuity level to new slave */ | |
1546 | if (bond_dev->flags & IFF_PROMISC) { | |
1547 | dev_set_promiscuity(slave_dev, 1); | |
1548 | } | |
1549 | ||
1550 | /* set allmulti level to new slave */ | |
1551 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1552 | dev_set_allmulti(slave_dev, 1); | |
1553 | } | |
1554 | ||
80ee5ad2 | 1555 | netif_tx_lock_bh(bond_dev); |
1da177e4 LT |
1556 | /* upload master's mc_list to new slave */ |
1557 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
1558 | dev_mc_add (slave_dev, dmi->dmi_addr, dmi->dmi_addrlen, 0); | |
1559 | } | |
80ee5ad2 | 1560 | netif_tx_unlock_bh(bond_dev); |
1da177e4 LT |
1561 | } |
1562 | ||
1563 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1564 | /* add lacpdu mc addr to mc list */ | |
1565 | u8 lacpdu_multicast[ETH_ALEN] = MULTICAST_LACPDU_ADDR; | |
1566 | ||
1567 | dev_mc_add(slave_dev, lacpdu_multicast, ETH_ALEN, 0); | |
1568 | } | |
1569 | ||
1570 | bond_add_vlans_on_slave(bond, slave_dev); | |
1571 | ||
1572 | write_lock_bh(&bond->lock); | |
1573 | ||
1574 | bond_attach_slave(bond, new_slave); | |
1575 | ||
1576 | new_slave->delay = 0; | |
1577 | new_slave->link_failure_count = 0; | |
1578 | ||
8531c5ff AK |
1579 | bond_compute_features(bond); |
1580 | ||
3915c1e8 JV |
1581 | write_unlock_bh(&bond->lock); |
1582 | ||
1583 | read_lock(&bond->lock); | |
1584 | ||
f5b2b966 JV |
1585 | new_slave->last_arp_rx = jiffies; |
1586 | ||
1da177e4 LT |
1587 | if (bond->params.miimon && !bond->params.use_carrier) { |
1588 | link_reporting = bond_check_dev_link(bond, slave_dev, 1); | |
1589 | ||
1590 | if ((link_reporting == -1) && !bond->params.arp_interval) { | |
1591 | /* | |
1592 | * miimon is set but a bonded network driver | |
1593 | * does not support ETHTOOL/MII and | |
1594 | * arp_interval is not set. Note: if | |
1595 | * use_carrier is enabled, we will never go | |
1596 | * here (because netif_carrier is always | |
1597 | * supported); thus, we don't need to change | |
1598 | * the messages for netif_carrier. | |
1599 | */ | |
1600 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1601 | ": %s: Warning: MII and ETHTOOL support not " |
1da177e4 LT |
1602 | "available for interface %s, and " |
1603 | "arp_interval/arp_ip_target module parameters " | |
1604 | "not specified, thus bonding will not detect " | |
1605 | "link failures! see bonding.txt for details.\n", | |
4e0952c7 | 1606 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1607 | } else if (link_reporting == -1) { |
1608 | /* unable get link status using mii/ethtool */ | |
1609 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1610 | ": %s: Warning: can't get link status from " |
1da177e4 LT |
1611 | "interface %s; the network driver associated " |
1612 | "with this interface does not support MII or " | |
1613 | "ETHTOOL link status reporting, thus miimon " | |
1614 | "has no effect on this interface.\n", | |
4e0952c7 | 1615 | bond_dev->name, slave_dev->name); |
1da177e4 LT |
1616 | } |
1617 | } | |
1618 | ||
1619 | /* check for initial state */ | |
1620 | if (!bond->params.miimon || | |
1621 | (bond_check_dev_link(bond, slave_dev, 0) == BMSR_LSTATUS)) { | |
1622 | if (bond->params.updelay) { | |
1623 | dprintk("Initial state of slave_dev is " | |
1624 | "BOND_LINK_BACK\n"); | |
1625 | new_slave->link = BOND_LINK_BACK; | |
1626 | new_slave->delay = bond->params.updelay; | |
1627 | } else { | |
1628 | dprintk("Initial state of slave_dev is " | |
1629 | "BOND_LINK_UP\n"); | |
1630 | new_slave->link = BOND_LINK_UP; | |
1631 | } | |
1632 | new_slave->jiffies = jiffies; | |
1633 | } else { | |
1634 | dprintk("Initial state of slave_dev is " | |
1635 | "BOND_LINK_DOWN\n"); | |
1636 | new_slave->link = BOND_LINK_DOWN; | |
1637 | } | |
1638 | ||
1639 | if (bond_update_speed_duplex(new_slave) && | |
1640 | (new_slave->link != BOND_LINK_DOWN)) { | |
1641 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1642 | ": %s: Warning: failed to get speed and duplex from %s, " |
1da177e4 | 1643 | "assumed to be 100Mb/sec and Full.\n", |
4e0952c7 | 1644 | bond_dev->name, new_slave->dev->name); |
1da177e4 LT |
1645 | |
1646 | if (bond->params.mode == BOND_MODE_8023AD) { | |
4e0952c7 MW |
1647 | printk(KERN_WARNING DRV_NAME |
1648 | ": %s: Warning: Operation of 802.3ad mode requires ETHTOOL " | |
1da177e4 | 1649 | "support in base driver for proper aggregator " |
4e0952c7 | 1650 | "selection.\n", bond_dev->name); |
1da177e4 LT |
1651 | } |
1652 | } | |
1653 | ||
1654 | if (USES_PRIMARY(bond->params.mode) && bond->params.primary[0]) { | |
1655 | /* if there is a primary slave, remember it */ | |
1656 | if (strcmp(bond->params.primary, new_slave->dev->name) == 0) { | |
1657 | bond->primary_slave = new_slave; | |
1658 | } | |
1659 | } | |
1660 | ||
3915c1e8 JV |
1661 | write_lock_bh(&bond->curr_slave_lock); |
1662 | ||
1da177e4 LT |
1663 | switch (bond->params.mode) { |
1664 | case BOND_MODE_ACTIVEBACKUP: | |
8a8e447b JV |
1665 | bond_set_slave_inactive_flags(new_slave); |
1666 | bond_select_active_slave(bond); | |
1da177e4 LT |
1667 | break; |
1668 | case BOND_MODE_8023AD: | |
1669 | /* in 802.3ad mode, the internal mechanism | |
1670 | * will activate the slaves in the selected | |
1671 | * aggregator | |
1672 | */ | |
1673 | bond_set_slave_inactive_flags(new_slave); | |
1674 | /* if this is the first slave */ | |
1675 | if (bond->slave_cnt == 1) { | |
1676 | SLAVE_AD_INFO(new_slave).id = 1; | |
1677 | /* Initialize AD with the number of times that the AD timer is called in 1 second | |
1678 | * can be called only after the mac address of the bond is set | |
1679 | */ | |
1680 | bond_3ad_initialize(bond, 1000/AD_TIMER_INTERVAL, | |
1681 | bond->params.lacp_fast); | |
1682 | } else { | |
1683 | SLAVE_AD_INFO(new_slave).id = | |
1684 | SLAVE_AD_INFO(new_slave->prev).id + 1; | |
1685 | } | |
1686 | ||
1687 | bond_3ad_bind_slave(new_slave); | |
1688 | break; | |
1689 | case BOND_MODE_TLB: | |
1690 | case BOND_MODE_ALB: | |
1691 | new_slave->state = BOND_STATE_ACTIVE; | |
059fe7a5 | 1692 | bond_set_slave_inactive_flags(new_slave); |
1da177e4 LT |
1693 | break; |
1694 | default: | |
1695 | dprintk("This slave is always active in trunk mode\n"); | |
1696 | ||
1697 | /* always active in trunk mode */ | |
1698 | new_slave->state = BOND_STATE_ACTIVE; | |
1699 | ||
1700 | /* In trunking mode there is little meaning to curr_active_slave | |
1701 | * anyway (it holds no special properties of the bond device), | |
1702 | * so we can change it without calling change_active_interface() | |
1703 | */ | |
1704 | if (!bond->curr_active_slave) { | |
1705 | bond->curr_active_slave = new_slave; | |
1706 | } | |
1707 | break; | |
1708 | } /* switch(bond_mode) */ | |
1709 | ||
3915c1e8 JV |
1710 | write_unlock_bh(&bond->curr_slave_lock); |
1711 | ||
ff59c456 JV |
1712 | bond_set_carrier(bond); |
1713 | ||
3915c1e8 | 1714 | read_unlock(&bond->lock); |
1da177e4 | 1715 | |
b76cdba9 MW |
1716 | res = bond_create_slave_symlinks(bond_dev, slave_dev); |
1717 | if (res) | |
569f0c4d | 1718 | goto err_close; |
b76cdba9 | 1719 | |
1da177e4 LT |
1720 | printk(KERN_INFO DRV_NAME |
1721 | ": %s: enslaving %s as a%s interface with a%s link.\n", | |
1722 | bond_dev->name, slave_dev->name, | |
1723 | new_slave->state == BOND_STATE_ACTIVE ? "n active" : " backup", | |
1724 | new_slave->link != BOND_LINK_DOWN ? "n up" : " down"); | |
1725 | ||
1726 | /* enslave is successful */ | |
1727 | return 0; | |
1728 | ||
1729 | /* Undo stages on error */ | |
1da177e4 LT |
1730 | err_close: |
1731 | dev_close(slave_dev); | |
1732 | ||
569f0c4d JV |
1733 | err_unset_master: |
1734 | netdev_set_master(slave_dev, NULL); | |
1735 | ||
1da177e4 | 1736 | err_restore_mac: |
dd957c57 | 1737 | if (!bond->params.fail_over_mac) { |
3915c1e8 JV |
1738 | /* XXX TODO - fom follow mode needs to change master's |
1739 | * MAC if this slave's MAC is in use by the bond, or at | |
1740 | * least print a warning. | |
1741 | */ | |
2ab82852 MS |
1742 | memcpy(addr.sa_data, new_slave->perm_hwaddr, ETH_ALEN); |
1743 | addr.sa_family = slave_dev->type; | |
1744 | dev_set_mac_address(slave_dev, &addr); | |
1745 | } | |
1da177e4 LT |
1746 | |
1747 | err_free: | |
1748 | kfree(new_slave); | |
1749 | ||
1750 | err_undo_flags: | |
1751 | bond_dev->features = old_features; | |
8531c5ff | 1752 | |
1da177e4 LT |
1753 | return res; |
1754 | } | |
1755 | ||
1756 | /* | |
1757 | * Try to release the slave device <slave> from the bond device <master> | |
1758 | * It is legal to access curr_active_slave without a lock because all the function | |
1759 | * is write-locked. | |
1760 | * | |
1761 | * The rules for slave state should be: | |
1762 | * for Active/Backup: | |
1763 | * Active stays on all backups go down | |
1764 | * for Bonded connections: | |
1765 | * The first up interface should be left on and all others downed. | |
1766 | */ | |
a77b5325 | 1767 | int bond_release(struct net_device *bond_dev, struct net_device *slave_dev) |
1da177e4 LT |
1768 | { |
1769 | struct bonding *bond = bond_dev->priv; | |
1770 | struct slave *slave, *oldcurrent; | |
1771 | struct sockaddr addr; | |
1772 | int mac_addr_differ; | |
0795af57 | 1773 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
1774 | |
1775 | /* slave is not a slave or master is not master of this slave */ | |
1776 | if (!(slave_dev->flags & IFF_SLAVE) || | |
1777 | (slave_dev->master != bond_dev)) { | |
1778 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1779 | ": %s: Error: cannot release %s.\n", |
1da177e4 LT |
1780 | bond_dev->name, slave_dev->name); |
1781 | return -EINVAL; | |
1782 | } | |
1783 | ||
1784 | write_lock_bh(&bond->lock); | |
1785 | ||
1786 | slave = bond_get_slave_by_dev(bond, slave_dev); | |
1787 | if (!slave) { | |
1788 | /* not a slave of this bond */ | |
1789 | printk(KERN_INFO DRV_NAME | |
1790 | ": %s: %s not enslaved\n", | |
1791 | bond_dev->name, slave_dev->name); | |
f5e2a7b2 | 1792 | write_unlock_bh(&bond->lock); |
1da177e4 LT |
1793 | return -EINVAL; |
1794 | } | |
1795 | ||
3915c1e8 JV |
1796 | if (!bond->params.fail_over_mac) { |
1797 | mac_addr_differ = memcmp(bond_dev->dev_addr, slave->perm_hwaddr, | |
1798 | ETH_ALEN); | |
1799 | if (!mac_addr_differ && (bond->slave_cnt > 1)) | |
1800 | printk(KERN_WARNING DRV_NAME | |
1801 | ": %s: Warning: the permanent HWaddr of %s - " | |
1802 | "%s - is still in use by %s. " | |
1803 | "Set the HWaddr of %s to a different address " | |
1804 | "to avoid conflicts.\n", | |
1805 | bond_dev->name, slave_dev->name, | |
1806 | print_mac(mac, slave->perm_hwaddr), | |
1807 | bond_dev->name, slave_dev->name); | |
1da177e4 LT |
1808 | } |
1809 | ||
1810 | /* Inform AD package of unbinding of slave. */ | |
1811 | if (bond->params.mode == BOND_MODE_8023AD) { | |
1812 | /* must be called before the slave is | |
1813 | * detached from the list | |
1814 | */ | |
1815 | bond_3ad_unbind_slave(slave); | |
1816 | } | |
1817 | ||
1818 | printk(KERN_INFO DRV_NAME | |
1819 | ": %s: releasing %s interface %s\n", | |
1820 | bond_dev->name, | |
1821 | (slave->state == BOND_STATE_ACTIVE) | |
1822 | ? "active" : "backup", | |
1823 | slave_dev->name); | |
1824 | ||
1825 | oldcurrent = bond->curr_active_slave; | |
1826 | ||
1827 | bond->current_arp_slave = NULL; | |
1828 | ||
1829 | /* release the slave from its bond */ | |
1830 | bond_detach_slave(bond, slave); | |
1831 | ||
8531c5ff AK |
1832 | bond_compute_features(bond); |
1833 | ||
1da177e4 LT |
1834 | if (bond->primary_slave == slave) { |
1835 | bond->primary_slave = NULL; | |
1836 | } | |
1837 | ||
1838 | if (oldcurrent == slave) { | |
1839 | bond_change_active_slave(bond, NULL); | |
1840 | } | |
1841 | ||
1842 | if ((bond->params.mode == BOND_MODE_TLB) || | |
1843 | (bond->params.mode == BOND_MODE_ALB)) { | |
1844 | /* Must be called only after the slave has been | |
1845 | * detached from the list and the curr_active_slave | |
1846 | * has been cleared (if our_slave == old_current), | |
1847 | * but before a new active slave is selected. | |
1848 | */ | |
2543331d | 1849 | write_unlock_bh(&bond->lock); |
1da177e4 | 1850 | bond_alb_deinit_slave(bond, slave); |
2543331d | 1851 | write_lock_bh(&bond->lock); |
1da177e4 LT |
1852 | } |
1853 | ||
059fe7a5 JV |
1854 | if (oldcurrent == slave) { |
1855 | /* | |
1856 | * Note that we hold RTNL over this sequence, so there | |
1857 | * is no concern that another slave add/remove event | |
1858 | * will interfere. | |
1859 | */ | |
1860 | write_unlock_bh(&bond->lock); | |
1861 | read_lock(&bond->lock); | |
1862 | write_lock_bh(&bond->curr_slave_lock); | |
1863 | ||
1da177e4 LT |
1864 | bond_select_active_slave(bond); |
1865 | ||
059fe7a5 JV |
1866 | write_unlock_bh(&bond->curr_slave_lock); |
1867 | read_unlock(&bond->lock); | |
1868 | write_lock_bh(&bond->lock); | |
1869 | } | |
1870 | ||
1da177e4 | 1871 | if (bond->slave_cnt == 0) { |
ff59c456 JV |
1872 | bond_set_carrier(bond); |
1873 | ||
1da177e4 LT |
1874 | /* if the last slave was removed, zero the mac address |
1875 | * of the master so it will be set by the application | |
1876 | * to the mac address of the first slave | |
1877 | */ | |
1878 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
1879 | ||
1880 | if (list_empty(&bond->vlan_list)) { | |
1881 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
1882 | } else { | |
1883 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1884 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 1885 | "still has VLANs.\n", |
4e0952c7 | 1886 | bond_dev->name, bond_dev->name); |
1da177e4 | 1887 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
1888 | ": %s: When re-adding slaves, make sure the bond's " |
1889 | "HW address matches its VLANs'.\n", | |
1890 | bond_dev->name); | |
1da177e4 LT |
1891 | } |
1892 | } else if ((bond_dev->features & NETIF_F_VLAN_CHALLENGED) && | |
1893 | !bond_has_challenged_slaves(bond)) { | |
1894 | printk(KERN_INFO DRV_NAME | |
4e0952c7 | 1895 | ": %s: last VLAN challenged slave %s " |
1da177e4 | 1896 | "left bond %s. VLAN blocking is removed\n", |
4e0952c7 | 1897 | bond_dev->name, slave_dev->name, bond_dev->name); |
1da177e4 LT |
1898 | bond_dev->features &= ~NETIF_F_VLAN_CHALLENGED; |
1899 | } | |
1900 | ||
1901 | write_unlock_bh(&bond->lock); | |
1902 | ||
b76cdba9 MW |
1903 | /* must do this from outside any spinlocks */ |
1904 | bond_destroy_slave_symlinks(bond_dev, slave_dev); | |
1905 | ||
1da177e4 LT |
1906 | bond_del_vlans_from_slave(bond, slave_dev); |
1907 | ||
1908 | /* If the mode USES_PRIMARY, then we should only remove its | |
1909 | * promisc and mc settings if it was the curr_active_slave, but that was | |
1910 | * already taken care of above when we detached the slave | |
1911 | */ | |
1912 | if (!USES_PRIMARY(bond->params.mode)) { | |
1913 | /* unset promiscuity level from slave */ | |
1914 | if (bond_dev->flags & IFF_PROMISC) { | |
1915 | dev_set_promiscuity(slave_dev, -1); | |
1916 | } | |
1917 | ||
1918 | /* unset allmulti level from slave */ | |
1919 | if (bond_dev->flags & IFF_ALLMULTI) { | |
1920 | dev_set_allmulti(slave_dev, -1); | |
1921 | } | |
1922 | ||
1923 | /* flush master's mc_list from slave */ | |
80ee5ad2 | 1924 | netif_tx_lock_bh(bond_dev); |
1da177e4 | 1925 | bond_mc_list_flush(bond_dev, slave_dev); |
80ee5ad2 | 1926 | netif_tx_unlock_bh(bond_dev); |
1da177e4 LT |
1927 | } |
1928 | ||
1929 | netdev_set_master(slave_dev, NULL); | |
1930 | ||
1931 | /* close slave before restoring its mac address */ | |
1932 | dev_close(slave_dev); | |
1933 | ||
3915c1e8 | 1934 | if (bond->params.fail_over_mac != BOND_FOM_ACTIVE) { |
2ab82852 MS |
1935 | /* restore original ("permanent") mac address */ |
1936 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
1937 | addr.sa_family = slave_dev->type; | |
1938 | dev_set_mac_address(slave_dev, &addr); | |
1939 | } | |
1da177e4 | 1940 | |
8f903c70 | 1941 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
f5b2b966 JV |
1942 | IFF_SLAVE_INACTIVE | IFF_BONDING | |
1943 | IFF_SLAVE_NEEDARP); | |
1da177e4 LT |
1944 | |
1945 | kfree(slave); | |
1946 | ||
1947 | return 0; /* deletion OK */ | |
1948 | } | |
1949 | ||
d90a162a MS |
1950 | /* |
1951 | * Destroy a bonding device. | |
1952 | * Must be under rtnl_lock when this function is called. | |
1953 | */ | |
1954 | void bond_destroy(struct bonding *bond) | |
1955 | { | |
1956 | bond_deinit(bond->dev); | |
1957 | bond_destroy_sysfs_entry(bond); | |
8cbdeec6 | 1958 | unregister_netdevice(bond->dev); |
d90a162a MS |
1959 | } |
1960 | ||
1961 | /* | |
1962 | * First release a slave and than destroy the bond if no more slaves iare left. | |
1963 | * Must be under rtnl_lock when this function is called. | |
1964 | */ | |
1965 | int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev) | |
1966 | { | |
1967 | struct bonding *bond = bond_dev->priv; | |
1968 | int ret; | |
1969 | ||
1970 | ret = bond_release(bond_dev, slave_dev); | |
1971 | if ((ret == 0) && (bond->slave_cnt == 0)) { | |
1972 | printk(KERN_INFO DRV_NAME ": %s: destroying bond %s.\n", | |
1973 | bond_dev->name, bond_dev->name); | |
1974 | bond_destroy(bond); | |
1975 | } | |
1976 | return ret; | |
1977 | } | |
1978 | ||
1da177e4 LT |
1979 | /* |
1980 | * This function releases all slaves. | |
1981 | */ | |
1982 | static int bond_release_all(struct net_device *bond_dev) | |
1983 | { | |
1984 | struct bonding *bond = bond_dev->priv; | |
1985 | struct slave *slave; | |
1986 | struct net_device *slave_dev; | |
1987 | struct sockaddr addr; | |
1988 | ||
1989 | write_lock_bh(&bond->lock); | |
1990 | ||
ff59c456 JV |
1991 | netif_carrier_off(bond_dev); |
1992 | ||
1da177e4 LT |
1993 | if (bond->slave_cnt == 0) { |
1994 | goto out; | |
1995 | } | |
1996 | ||
1997 | bond->current_arp_slave = NULL; | |
1998 | bond->primary_slave = NULL; | |
1999 | bond_change_active_slave(bond, NULL); | |
2000 | ||
2001 | while ((slave = bond->first_slave) != NULL) { | |
2002 | /* Inform AD package of unbinding of slave | |
2003 | * before slave is detached from the list. | |
2004 | */ | |
2005 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2006 | bond_3ad_unbind_slave(slave); | |
2007 | } | |
2008 | ||
2009 | slave_dev = slave->dev; | |
2010 | bond_detach_slave(bond, slave); | |
2011 | ||
2543331d JV |
2012 | /* now that the slave is detached, unlock and perform |
2013 | * all the undo steps that should not be called from | |
2014 | * within a lock. | |
2015 | */ | |
2016 | write_unlock_bh(&bond->lock); | |
2017 | ||
1da177e4 LT |
2018 | if ((bond->params.mode == BOND_MODE_TLB) || |
2019 | (bond->params.mode == BOND_MODE_ALB)) { | |
2020 | /* must be called only after the slave | |
2021 | * has been detached from the list | |
2022 | */ | |
2023 | bond_alb_deinit_slave(bond, slave); | |
2024 | } | |
2025 | ||
8531c5ff AK |
2026 | bond_compute_features(bond); |
2027 | ||
b76cdba9 | 2028 | bond_destroy_slave_symlinks(bond_dev, slave_dev); |
1da177e4 LT |
2029 | bond_del_vlans_from_slave(bond, slave_dev); |
2030 | ||
2031 | /* If the mode USES_PRIMARY, then we should only remove its | |
2032 | * promisc and mc settings if it was the curr_active_slave, but that was | |
2033 | * already taken care of above when we detached the slave | |
2034 | */ | |
2035 | if (!USES_PRIMARY(bond->params.mode)) { | |
2036 | /* unset promiscuity level from slave */ | |
2037 | if (bond_dev->flags & IFF_PROMISC) { | |
2038 | dev_set_promiscuity(slave_dev, -1); | |
2039 | } | |
2040 | ||
2041 | /* unset allmulti level from slave */ | |
2042 | if (bond_dev->flags & IFF_ALLMULTI) { | |
2043 | dev_set_allmulti(slave_dev, -1); | |
2044 | } | |
2045 | ||
2046 | /* flush master's mc_list from slave */ | |
80ee5ad2 | 2047 | netif_tx_lock_bh(bond_dev); |
1da177e4 | 2048 | bond_mc_list_flush(bond_dev, slave_dev); |
80ee5ad2 | 2049 | netif_tx_unlock_bh(bond_dev); |
1da177e4 LT |
2050 | } |
2051 | ||
2052 | netdev_set_master(slave_dev, NULL); | |
2053 | ||
2054 | /* close slave before restoring its mac address */ | |
2055 | dev_close(slave_dev); | |
2056 | ||
dd957c57 | 2057 | if (!bond->params.fail_over_mac) { |
2ab82852 MS |
2058 | /* restore original ("permanent") mac address*/ |
2059 | memcpy(addr.sa_data, slave->perm_hwaddr, ETH_ALEN); | |
2060 | addr.sa_family = slave_dev->type; | |
2061 | dev_set_mac_address(slave_dev, &addr); | |
2062 | } | |
1da177e4 | 2063 | |
8f903c70 JV |
2064 | slave_dev->priv_flags &= ~(IFF_MASTER_8023AD | IFF_MASTER_ALB | |
2065 | IFF_SLAVE_INACTIVE); | |
1da177e4 LT |
2066 | |
2067 | kfree(slave); | |
2068 | ||
2069 | /* re-acquire the lock before getting the next slave */ | |
2070 | write_lock_bh(&bond->lock); | |
2071 | } | |
2072 | ||
2073 | /* zero the mac address of the master so it will be | |
2074 | * set by the application to the mac address of the | |
2075 | * first slave | |
2076 | */ | |
2077 | memset(bond_dev->dev_addr, 0, bond_dev->addr_len); | |
2078 | ||
2079 | if (list_empty(&bond->vlan_list)) { | |
2080 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
2081 | } else { | |
2082 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 2083 | ": %s: Warning: clearing HW address of %s while it " |
1da177e4 | 2084 | "still has VLANs.\n", |
4e0952c7 | 2085 | bond_dev->name, bond_dev->name); |
1da177e4 | 2086 | printk(KERN_WARNING DRV_NAME |
4e0952c7 MW |
2087 | ": %s: When re-adding slaves, make sure the bond's " |
2088 | "HW address matches its VLANs'.\n", | |
2089 | bond_dev->name); | |
1da177e4 LT |
2090 | } |
2091 | ||
2092 | printk(KERN_INFO DRV_NAME | |
2093 | ": %s: released all slaves\n", | |
2094 | bond_dev->name); | |
2095 | ||
2096 | out: | |
2097 | write_unlock_bh(&bond->lock); | |
2098 | ||
2099 | return 0; | |
2100 | } | |
2101 | ||
2102 | /* | |
2103 | * This function changes the active slave to slave <slave_dev>. | |
2104 | * It returns -EINVAL in the following cases. | |
2105 | * - <slave_dev> is not found in the list. | |
2106 | * - There is not active slave now. | |
2107 | * - <slave_dev> is already active. | |
2108 | * - The link state of <slave_dev> is not BOND_LINK_UP. | |
2109 | * - <slave_dev> is not running. | |
2110 | * In these cases, this fuction does nothing. | |
2111 | * In the other cases, currnt_slave pointer is changed and 0 is returned. | |
2112 | */ | |
2113 | static int bond_ioctl_change_active(struct net_device *bond_dev, struct net_device *slave_dev) | |
2114 | { | |
2115 | struct bonding *bond = bond_dev->priv; | |
2116 | struct slave *old_active = NULL; | |
2117 | struct slave *new_active = NULL; | |
2118 | int res = 0; | |
2119 | ||
2120 | if (!USES_PRIMARY(bond->params.mode)) { | |
2121 | return -EINVAL; | |
2122 | } | |
2123 | ||
2124 | /* Verify that master_dev is indeed the master of slave_dev */ | |
2125 | if (!(slave_dev->flags & IFF_SLAVE) || | |
2126 | (slave_dev->master != bond_dev)) { | |
2127 | return -EINVAL; | |
2128 | } | |
2129 | ||
059fe7a5 | 2130 | read_lock(&bond->lock); |
1da177e4 | 2131 | |
059fe7a5 | 2132 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 2133 | old_active = bond->curr_active_slave; |
059fe7a5 JV |
2134 | read_unlock(&bond->curr_slave_lock); |
2135 | ||
1da177e4 LT |
2136 | new_active = bond_get_slave_by_dev(bond, slave_dev); |
2137 | ||
2138 | /* | |
2139 | * Changing to the current active: do nothing; return success. | |
2140 | */ | |
2141 | if (new_active && (new_active == old_active)) { | |
059fe7a5 | 2142 | read_unlock(&bond->lock); |
1da177e4 LT |
2143 | return 0; |
2144 | } | |
2145 | ||
2146 | if ((new_active) && | |
2147 | (old_active) && | |
2148 | (new_active->link == BOND_LINK_UP) && | |
2149 | IS_UP(new_active->dev)) { | |
059fe7a5 | 2150 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 | 2151 | bond_change_active_slave(bond, new_active); |
059fe7a5 | 2152 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2153 | } else { |
2154 | res = -EINVAL; | |
2155 | } | |
2156 | ||
059fe7a5 | 2157 | read_unlock(&bond->lock); |
1da177e4 LT |
2158 | |
2159 | return res; | |
2160 | } | |
2161 | ||
1da177e4 LT |
2162 | static int bond_info_query(struct net_device *bond_dev, struct ifbond *info) |
2163 | { | |
2164 | struct bonding *bond = bond_dev->priv; | |
2165 | ||
2166 | info->bond_mode = bond->params.mode; | |
2167 | info->miimon = bond->params.miimon; | |
2168 | ||
6603a6f2 | 2169 | read_lock(&bond->lock); |
1da177e4 | 2170 | info->num_slaves = bond->slave_cnt; |
6603a6f2 | 2171 | read_unlock(&bond->lock); |
1da177e4 LT |
2172 | |
2173 | return 0; | |
2174 | } | |
2175 | ||
2176 | static int bond_slave_info_query(struct net_device *bond_dev, struct ifslave *info) | |
2177 | { | |
2178 | struct bonding *bond = bond_dev->priv; | |
2179 | struct slave *slave; | |
2180 | int i, found = 0; | |
2181 | ||
2182 | if (info->slave_id < 0) { | |
2183 | return -ENODEV; | |
2184 | } | |
2185 | ||
6603a6f2 | 2186 | read_lock(&bond->lock); |
1da177e4 LT |
2187 | |
2188 | bond_for_each_slave(bond, slave, i) { | |
2189 | if (i == (int)info->slave_id) { | |
2190 | found = 1; | |
2191 | break; | |
2192 | } | |
2193 | } | |
2194 | ||
6603a6f2 | 2195 | read_unlock(&bond->lock); |
1da177e4 LT |
2196 | |
2197 | if (found) { | |
2198 | strcpy(info->slave_name, slave->dev->name); | |
2199 | info->link = slave->link; | |
2200 | info->state = slave->state; | |
2201 | info->link_failure_count = slave->link_failure_count; | |
2202 | } else { | |
2203 | return -ENODEV; | |
2204 | } | |
2205 | ||
2206 | return 0; | |
2207 | } | |
2208 | ||
2209 | /*-------------------------------- Monitoring -------------------------------*/ | |
2210 | ||
0b0eef66 JV |
2211 | /* |
2212 | * if !have_locks, return nonzero if a failover is necessary. if | |
2213 | * have_locks, do whatever failover activities are needed. | |
2214 | * | |
2215 | * This is to separate the inspection and failover steps for locking | |
2216 | * purposes; failover requires rtnl, but acquiring it for every | |
2217 | * inspection is undesirable, so a wrapper first does inspection, and | |
2218 | * the acquires the necessary locks and calls again to perform | |
2219 | * failover if needed. Since all locks are dropped, a complete | |
2220 | * restart is needed between calls. | |
2221 | */ | |
2222 | static int __bond_mii_monitor(struct bonding *bond, int have_locks) | |
1da177e4 | 2223 | { |
1da177e4 LT |
2224 | struct slave *slave, *oldcurrent; |
2225 | int do_failover = 0; | |
1da177e4 LT |
2226 | int i; |
2227 | ||
0b0eef66 | 2228 | if (bond->slave_cnt == 0) |
1da177e4 | 2229 | goto out; |
1da177e4 LT |
2230 | |
2231 | /* we will try to read the link status of each of our slaves, and | |
2232 | * set their IFF_RUNNING flag appropriately. For each slave not | |
2233 | * supporting MII status, we won't do anything so that a user-space | |
2234 | * program could monitor the link itself if needed. | |
2235 | */ | |
2236 | ||
2237 | read_lock(&bond->curr_slave_lock); | |
2238 | oldcurrent = bond->curr_active_slave; | |
2239 | read_unlock(&bond->curr_slave_lock); | |
2240 | ||
2241 | bond_for_each_slave(bond, slave, i) { | |
2242 | struct net_device *slave_dev = slave->dev; | |
2243 | int link_state; | |
2244 | u16 old_speed = slave->speed; | |
2245 | u8 old_duplex = slave->duplex; | |
2246 | ||
2247 | link_state = bond_check_dev_link(bond, slave_dev, 0); | |
2248 | ||
2249 | switch (slave->link) { | |
2250 | case BOND_LINK_UP: /* the link was up */ | |
2251 | if (link_state == BMSR_LSTATUS) { | |
059fe7a5 JV |
2252 | if (!oldcurrent) { |
2253 | if (!have_locks) | |
2254 | return 1; | |
2255 | do_failover = 1; | |
2256 | } | |
1da177e4 LT |
2257 | break; |
2258 | } else { /* link going down */ | |
2259 | slave->link = BOND_LINK_FAIL; | |
2260 | slave->delay = bond->params.downdelay; | |
2261 | ||
2262 | if (slave->link_failure_count < UINT_MAX) { | |
2263 | slave->link_failure_count++; | |
2264 | } | |
2265 | ||
2266 | if (bond->params.downdelay) { | |
2267 | printk(KERN_INFO DRV_NAME | |
2268 | ": %s: link status down for %s " | |
2269 | "interface %s, disabling it in " | |
2270 | "%d ms.\n", | |
1b76b316 | 2271 | bond->dev->name, |
1da177e4 LT |
2272 | IS_UP(slave_dev) |
2273 | ? ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) | |
2274 | ? ((slave == oldcurrent) | |
2275 | ? "active " : "backup ") | |
2276 | : "") | |
2277 | : "idle ", | |
2278 | slave_dev->name, | |
2279 | bond->params.downdelay * bond->params.miimon); | |
2280 | } | |
2281 | } | |
2282 | /* no break ! fall through the BOND_LINK_FAIL test to | |
2283 | ensure proper action to be taken | |
2284 | */ | |
2285 | case BOND_LINK_FAIL: /* the link has just gone down */ | |
2286 | if (link_state != BMSR_LSTATUS) { | |
2287 | /* link stays down */ | |
2288 | if (slave->delay <= 0) { | |
0b0eef66 JV |
2289 | if (!have_locks) |
2290 | return 1; | |
2291 | ||
1da177e4 LT |
2292 | /* link down for too long time */ |
2293 | slave->link = BOND_LINK_DOWN; | |
2294 | ||
2295 | /* in active/backup mode, we must | |
2296 | * completely disable this interface | |
2297 | */ | |
2298 | if ((bond->params.mode == BOND_MODE_ACTIVEBACKUP) || | |
2299 | (bond->params.mode == BOND_MODE_8023AD)) { | |
2300 | bond_set_slave_inactive_flags(slave); | |
2301 | } | |
2302 | ||
2303 | printk(KERN_INFO DRV_NAME | |
2304 | ": %s: link status definitely " | |
2305 | "down for interface %s, " | |
2306 | "disabling it\n", | |
1b76b316 | 2307 | bond->dev->name, |
1da177e4 LT |
2308 | slave_dev->name); |
2309 | ||
2310 | /* notify ad that the link status has changed */ | |
2311 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2312 | bond_3ad_handle_link_change(slave, BOND_LINK_DOWN); | |
2313 | } | |
2314 | ||
2315 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2316 | (bond->params.mode == BOND_MODE_ALB)) { | |
2317 | bond_alb_handle_link_change(bond, slave, BOND_LINK_DOWN); | |
2318 | } | |
2319 | ||
2320 | if (slave == oldcurrent) { | |
2321 | do_failover = 1; | |
2322 | } | |
2323 | } else { | |
2324 | slave->delay--; | |
2325 | } | |
2326 | } else { | |
2327 | /* link up again */ | |
2328 | slave->link = BOND_LINK_UP; | |
2329 | slave->jiffies = jiffies; | |
2330 | printk(KERN_INFO DRV_NAME | |
2331 | ": %s: link status up again after %d " | |
2332 | "ms for interface %s.\n", | |
1b76b316 | 2333 | bond->dev->name, |
1da177e4 LT |
2334 | (bond->params.downdelay - slave->delay) * bond->params.miimon, |
2335 | slave_dev->name); | |
2336 | } | |
2337 | break; | |
2338 | case BOND_LINK_DOWN: /* the link was down */ | |
2339 | if (link_state != BMSR_LSTATUS) { | |
2340 | /* the link stays down, nothing more to do */ | |
2341 | break; | |
2342 | } else { /* link going up */ | |
2343 | slave->link = BOND_LINK_BACK; | |
2344 | slave->delay = bond->params.updelay; | |
2345 | ||
2346 | if (bond->params.updelay) { | |
2347 | /* if updelay == 0, no need to | |
2348 | advertise about a 0 ms delay */ | |
2349 | printk(KERN_INFO DRV_NAME | |
2350 | ": %s: link status up for " | |
2351 | "interface %s, enabling it " | |
2352 | "in %d ms.\n", | |
1b76b316 | 2353 | bond->dev->name, |
1da177e4 LT |
2354 | slave_dev->name, |
2355 | bond->params.updelay * bond->params.miimon); | |
2356 | } | |
2357 | } | |
2358 | /* no break ! fall through the BOND_LINK_BACK state in | |
2359 | case there's something to do. | |
2360 | */ | |
2361 | case BOND_LINK_BACK: /* the link has just come back */ | |
2362 | if (link_state != BMSR_LSTATUS) { | |
2363 | /* link down again */ | |
2364 | slave->link = BOND_LINK_DOWN; | |
2365 | ||
2366 | printk(KERN_INFO DRV_NAME | |
2367 | ": %s: link status down again after %d " | |
2368 | "ms for interface %s.\n", | |
1b76b316 | 2369 | bond->dev->name, |
1da177e4 LT |
2370 | (bond->params.updelay - slave->delay) * bond->params.miimon, |
2371 | slave_dev->name); | |
2372 | } else { | |
2373 | /* link stays up */ | |
2374 | if (slave->delay == 0) { | |
0b0eef66 JV |
2375 | if (!have_locks) |
2376 | return 1; | |
2377 | ||
1da177e4 LT |
2378 | /* now the link has been up for long time enough */ |
2379 | slave->link = BOND_LINK_UP; | |
2380 | slave->jiffies = jiffies; | |
2381 | ||
2382 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2383 | /* prevent it from being the active one */ | |
2384 | slave->state = BOND_STATE_BACKUP; | |
2385 | } else if (bond->params.mode != BOND_MODE_ACTIVEBACKUP) { | |
2386 | /* make it immediately active */ | |
2387 | slave->state = BOND_STATE_ACTIVE; | |
2388 | } else if (slave != bond->primary_slave) { | |
2389 | /* prevent it from being the active one */ | |
2390 | slave->state = BOND_STATE_BACKUP; | |
2391 | } | |
2392 | ||
2393 | printk(KERN_INFO DRV_NAME | |
2394 | ": %s: link status definitely " | |
2395 | "up for interface %s.\n", | |
1b76b316 | 2396 | bond->dev->name, |
1da177e4 LT |
2397 | slave_dev->name); |
2398 | ||
2399 | /* notify ad that the link status has changed */ | |
2400 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2401 | bond_3ad_handle_link_change(slave, BOND_LINK_UP); | |
2402 | } | |
2403 | ||
2404 | if ((bond->params.mode == BOND_MODE_TLB) || | |
2405 | (bond->params.mode == BOND_MODE_ALB)) { | |
2406 | bond_alb_handle_link_change(bond, slave, BOND_LINK_UP); | |
2407 | } | |
2408 | ||
2409 | if ((!oldcurrent) || | |
2410 | (slave == bond->primary_slave)) { | |
2411 | do_failover = 1; | |
2412 | } | |
2413 | } else { | |
2414 | slave->delay--; | |
2415 | } | |
2416 | } | |
2417 | break; | |
2418 | default: | |
2419 | /* Should not happen */ | |
4e0952c7 MW |
2420 | printk(KERN_ERR DRV_NAME |
2421 | ": %s: Error: %s Illegal value (link=%d)\n", | |
1b76b316 | 2422 | bond->dev->name, |
4e0952c7 MW |
2423 | slave->dev->name, |
2424 | slave->link); | |
1da177e4 LT |
2425 | goto out; |
2426 | } /* end of switch (slave->link) */ | |
2427 | ||
2428 | bond_update_speed_duplex(slave); | |
2429 | ||
2430 | if (bond->params.mode == BOND_MODE_8023AD) { | |
2431 | if (old_speed != slave->speed) { | |
2432 | bond_3ad_adapter_speed_changed(slave); | |
2433 | } | |
2434 | ||
2435 | if (old_duplex != slave->duplex) { | |
2436 | bond_3ad_adapter_duplex_changed(slave); | |
2437 | } | |
2438 | } | |
2439 | ||
2440 | } /* end of for */ | |
2441 | ||
2442 | if (do_failover) { | |
059fe7a5 JV |
2443 | ASSERT_RTNL(); |
2444 | ||
2445 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 LT |
2446 | |
2447 | bond_select_active_slave(bond); | |
2448 | ||
059fe7a5 JV |
2449 | write_unlock_bh(&bond->curr_slave_lock); |
2450 | ||
ff59c456 JV |
2451 | } else |
2452 | bond_set_carrier(bond); | |
1da177e4 | 2453 | |
1da177e4 | 2454 | out: |
0b0eef66 | 2455 | return 0; |
1da177e4 LT |
2456 | } |
2457 | ||
0b0eef66 JV |
2458 | /* |
2459 | * bond_mii_monitor | |
2460 | * | |
2461 | * Really a wrapper that splits the mii monitor into two phases: an | |
2462 | * inspection, then (if inspection indicates something needs to be | |
2463 | * done) an acquisition of appropriate locks followed by another pass | |
2464 | * to implement whatever link state changes are indicated. | |
2465 | */ | |
2466 | void bond_mii_monitor(struct work_struct *work) | |
2467 | { | |
2468 | struct bonding *bond = container_of(work, struct bonding, | |
2469 | mii_work.work); | |
2470 | unsigned long delay; | |
2471 | ||
2472 | read_lock(&bond->lock); | |
2473 | if (bond->kill_timers) { | |
2474 | read_unlock(&bond->lock); | |
2475 | return; | |
2476 | } | |
b59f9f74 JV |
2477 | |
2478 | if (bond->send_grat_arp) { | |
2479 | read_lock(&bond->curr_slave_lock); | |
2480 | bond_send_gratuitous_arp(bond); | |
2481 | read_unlock(&bond->curr_slave_lock); | |
2482 | } | |
2483 | ||
0b0eef66 JV |
2484 | if (__bond_mii_monitor(bond, 0)) { |
2485 | read_unlock(&bond->lock); | |
2486 | rtnl_lock(); | |
2487 | read_lock(&bond->lock); | |
2488 | __bond_mii_monitor(bond, 1); | |
5655662d JV |
2489 | read_unlock(&bond->lock); |
2490 | rtnl_unlock(); /* might sleep, hold no other locks */ | |
2491 | read_lock(&bond->lock); | |
0b0eef66 JV |
2492 | } |
2493 | ||
5ce0da8f | 2494 | delay = msecs_to_jiffies(bond->params.miimon); |
0b0eef66 JV |
2495 | read_unlock(&bond->lock); |
2496 | queue_delayed_work(bond->wq, &bond->mii_work, delay); | |
2497 | } | |
c3ade5ca | 2498 | |
d3bb52b0 | 2499 | static __be32 bond_glean_dev_ip(struct net_device *dev) |
c3ade5ca JV |
2500 | { |
2501 | struct in_device *idev; | |
2502 | struct in_ifaddr *ifa; | |
a144ea4b | 2503 | __be32 addr = 0; |
c3ade5ca JV |
2504 | |
2505 | if (!dev) | |
2506 | return 0; | |
2507 | ||
2508 | rcu_read_lock(); | |
e5ed6399 | 2509 | idev = __in_dev_get_rcu(dev); |
c3ade5ca JV |
2510 | if (!idev) |
2511 | goto out; | |
2512 | ||
2513 | ifa = idev->ifa_list; | |
2514 | if (!ifa) | |
2515 | goto out; | |
2516 | ||
2517 | addr = ifa->ifa_local; | |
2518 | out: | |
2519 | rcu_read_unlock(); | |
2520 | return addr; | |
2521 | } | |
2522 | ||
d3bb52b0 | 2523 | static int bond_has_this_ip(struct bonding *bond, __be32 ip) |
f5b2b966 | 2524 | { |
0883beca | 2525 | struct vlan_entry *vlan; |
f5b2b966 JV |
2526 | |
2527 | if (ip == bond->master_ip) | |
2528 | return 1; | |
2529 | ||
0883beca | 2530 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
f5b2b966 JV |
2531 | if (ip == vlan->vlan_ip) |
2532 | return 1; | |
2533 | } | |
2534 | ||
2535 | return 0; | |
2536 | } | |
2537 | ||
c3ade5ca JV |
2538 | /* |
2539 | * We go to the (large) trouble of VLAN tagging ARP frames because | |
2540 | * switches in VLAN mode (especially if ports are configured as | |
2541 | * "native" to a VLAN) might not pass non-tagged frames. | |
2542 | */ | |
d3bb52b0 | 2543 | static void bond_arp_send(struct net_device *slave_dev, int arp_op, __be32 dest_ip, __be32 src_ip, unsigned short vlan_id) |
c3ade5ca JV |
2544 | { |
2545 | struct sk_buff *skb; | |
2546 | ||
2547 | dprintk("arp %d on slave %s: dst %x src %x vid %d\n", arp_op, | |
2548 | slave_dev->name, dest_ip, src_ip, vlan_id); | |
2549 | ||
2550 | skb = arp_create(arp_op, ETH_P_ARP, dest_ip, slave_dev, src_ip, | |
2551 | NULL, slave_dev->dev_addr, NULL); | |
2552 | ||
2553 | if (!skb) { | |
2554 | printk(KERN_ERR DRV_NAME ": ARP packet allocation failed\n"); | |
2555 | return; | |
2556 | } | |
2557 | if (vlan_id) { | |
2558 | skb = vlan_put_tag(skb, vlan_id); | |
2559 | if (!skb) { | |
2560 | printk(KERN_ERR DRV_NAME ": failed to insert VLAN tag\n"); | |
2561 | return; | |
2562 | } | |
2563 | } | |
2564 | arp_xmit(skb); | |
2565 | } | |
2566 | ||
2567 | ||
1da177e4 LT |
2568 | static void bond_arp_send_all(struct bonding *bond, struct slave *slave) |
2569 | { | |
c3ade5ca | 2570 | int i, vlan_id, rv; |
d3bb52b0 | 2571 | __be32 *targets = bond->params.arp_targets; |
0883beca | 2572 | struct vlan_entry *vlan; |
c3ade5ca JV |
2573 | struct net_device *vlan_dev; |
2574 | struct flowi fl; | |
2575 | struct rtable *rt; | |
1da177e4 | 2576 | |
6b780567 MW |
2577 | for (i = 0; (i < BOND_MAX_ARP_TARGETS); i++) { |
2578 | if (!targets[i]) | |
2579 | continue; | |
c3ade5ca JV |
2580 | dprintk("basa: target %x\n", targets[i]); |
2581 | if (list_empty(&bond->vlan_list)) { | |
2582 | dprintk("basa: empty vlan: arp_send\n"); | |
2583 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2584 | bond->master_ip, 0); | |
2585 | continue; | |
2586 | } | |
2587 | ||
2588 | /* | |
2589 | * If VLANs are configured, we do a route lookup to | |
2590 | * determine which VLAN interface would be used, so we | |
2591 | * can tag the ARP with the proper VLAN tag. | |
2592 | */ | |
2593 | memset(&fl, 0, sizeof(fl)); | |
2594 | fl.fl4_dst = targets[i]; | |
2595 | fl.fl4_tos = RTO_ONLINK; | |
2596 | ||
f206351a | 2597 | rv = ip_route_output_key(&init_net, &rt, &fl); |
c3ade5ca JV |
2598 | if (rv) { |
2599 | if (net_ratelimit()) { | |
2600 | printk(KERN_WARNING DRV_NAME | |
2601 | ": %s: no route to arp_ip_target %u.%u.%u.%u\n", | |
2602 | bond->dev->name, NIPQUAD(fl.fl4_dst)); | |
2603 | } | |
2604 | continue; | |
2605 | } | |
2606 | ||
2607 | /* | |
2608 | * This target is not on a VLAN | |
2609 | */ | |
2610 | if (rt->u.dst.dev == bond->dev) { | |
ed4b9f80 | 2611 | ip_rt_put(rt); |
c3ade5ca JV |
2612 | dprintk("basa: rtdev == bond->dev: arp_send\n"); |
2613 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], | |
2614 | bond->master_ip, 0); | |
2615 | continue; | |
2616 | } | |
2617 | ||
2618 | vlan_id = 0; | |
0883beca | 2619 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 2620 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2621 | if (vlan_dev == rt->u.dst.dev) { |
2622 | vlan_id = vlan->vlan_id; | |
2623 | dprintk("basa: vlan match on %s %d\n", | |
2624 | vlan_dev->name, vlan_id); | |
2625 | break; | |
2626 | } | |
2627 | } | |
2628 | ||
2629 | if (vlan_id) { | |
ed4b9f80 | 2630 | ip_rt_put(rt); |
c3ade5ca JV |
2631 | bond_arp_send(slave->dev, ARPOP_REQUEST, targets[i], |
2632 | vlan->vlan_ip, vlan_id); | |
2633 | continue; | |
2634 | } | |
2635 | ||
2636 | if (net_ratelimit()) { | |
2637 | printk(KERN_WARNING DRV_NAME | |
2638 | ": %s: no path to arp_ip_target %u.%u.%u.%u via rt.dev %s\n", | |
2639 | bond->dev->name, NIPQUAD(fl.fl4_dst), | |
2640 | rt->u.dst.dev ? rt->u.dst.dev->name : "NULL"); | |
2641 | } | |
ed4b9f80 | 2642 | ip_rt_put(rt); |
c3ade5ca JV |
2643 | } |
2644 | } | |
2645 | ||
2646 | /* | |
2647 | * Kick out a gratuitous ARP for an IP on the bonding master plus one | |
2648 | * for each VLAN above us. | |
b59f9f74 JV |
2649 | * |
2650 | * Caller must hold curr_slave_lock for read or better | |
c3ade5ca JV |
2651 | */ |
2652 | static void bond_send_gratuitous_arp(struct bonding *bond) | |
2653 | { | |
2654 | struct slave *slave = bond->curr_active_slave; | |
2655 | struct vlan_entry *vlan; | |
2656 | struct net_device *vlan_dev; | |
2657 | ||
2658 | dprintk("bond_send_grat_arp: bond %s slave %s\n", bond->dev->name, | |
2659 | slave ? slave->dev->name : "NULL"); | |
b59f9f74 JV |
2660 | |
2661 | if (!slave || !bond->send_grat_arp || | |
2662 | test_bit(__LINK_STATE_LINKWATCH_PENDING, &slave->dev->state)) | |
c3ade5ca JV |
2663 | return; |
2664 | ||
b59f9f74 JV |
2665 | bond->send_grat_arp--; |
2666 | ||
c3ade5ca JV |
2667 | if (bond->master_ip) { |
2668 | bond_arp_send(slave->dev, ARPOP_REPLY, bond->master_ip, | |
1053f62c | 2669 | bond->master_ip, 0); |
c3ade5ca JV |
2670 | } |
2671 | ||
2672 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { | |
5c15bdec | 2673 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
2674 | if (vlan->vlan_ip) { |
2675 | bond_arp_send(slave->dev, ARPOP_REPLY, vlan->vlan_ip, | |
2676 | vlan->vlan_ip, vlan->vlan_id); | |
2677 | } | |
1da177e4 LT |
2678 | } |
2679 | } | |
2680 | ||
d3bb52b0 | 2681 | static void bond_validate_arp(struct bonding *bond, struct slave *slave, __be32 sip, __be32 tip) |
f5b2b966 JV |
2682 | { |
2683 | int i; | |
d3bb52b0 | 2684 | __be32 *targets = bond->params.arp_targets; |
f5b2b966 JV |
2685 | |
2686 | targets = bond->params.arp_targets; | |
2687 | for (i = 0; (i < BOND_MAX_ARP_TARGETS) && targets[i]; i++) { | |
2688 | dprintk("bva: sip %u.%u.%u.%u tip %u.%u.%u.%u t[%d] " | |
2689 | "%u.%u.%u.%u bhti(tip) %d\n", | |
2690 | NIPQUAD(sip), NIPQUAD(tip), i, NIPQUAD(targets[i]), | |
2691 | bond_has_this_ip(bond, tip)); | |
2692 | if (sip == targets[i]) { | |
2693 | if (bond_has_this_ip(bond, tip)) | |
2694 | slave->last_arp_rx = jiffies; | |
2695 | return; | |
2696 | } | |
2697 | } | |
2698 | } | |
2699 | ||
2700 | static int bond_arp_rcv(struct sk_buff *skb, struct net_device *dev, struct packet_type *pt, struct net_device *orig_dev) | |
2701 | { | |
2702 | struct arphdr *arp; | |
2703 | struct slave *slave; | |
2704 | struct bonding *bond; | |
2705 | unsigned char *arp_ptr; | |
d3bb52b0 | 2706 | __be32 sip, tip; |
f5b2b966 | 2707 | |
c346dca1 | 2708 | if (dev_net(dev) != &init_net) |
e730c155 EB |
2709 | goto out; |
2710 | ||
f5b2b966 JV |
2711 | if (!(dev->priv_flags & IFF_BONDING) || !(dev->flags & IFF_MASTER)) |
2712 | goto out; | |
2713 | ||
2714 | bond = dev->priv; | |
2715 | read_lock(&bond->lock); | |
2716 | ||
2717 | dprintk("bond_arp_rcv: bond %s skb->dev %s orig_dev %s\n", | |
2718 | bond->dev->name, skb->dev ? skb->dev->name : "NULL", | |
2719 | orig_dev ? orig_dev->name : "NULL"); | |
2720 | ||
2721 | slave = bond_get_slave_by_dev(bond, orig_dev); | |
2722 | if (!slave || !slave_do_arp_validate(bond, slave)) | |
2723 | goto out_unlock; | |
2724 | ||
988b7050 | 2725 | if (!pskb_may_pull(skb, arp_hdr_len(dev))) |
f5b2b966 JV |
2726 | goto out_unlock; |
2727 | ||
d0a92be0 | 2728 | arp = arp_hdr(skb); |
f5b2b966 JV |
2729 | if (arp->ar_hln != dev->addr_len || |
2730 | skb->pkt_type == PACKET_OTHERHOST || | |
2731 | skb->pkt_type == PACKET_LOOPBACK || | |
2732 | arp->ar_hrd != htons(ARPHRD_ETHER) || | |
2733 | arp->ar_pro != htons(ETH_P_IP) || | |
2734 | arp->ar_pln != 4) | |
2735 | goto out_unlock; | |
2736 | ||
2737 | arp_ptr = (unsigned char *)(arp + 1); | |
2738 | arp_ptr += dev->addr_len; | |
2739 | memcpy(&sip, arp_ptr, 4); | |
2740 | arp_ptr += 4 + dev->addr_len; | |
2741 | memcpy(&tip, arp_ptr, 4); | |
2742 | ||
2743 | dprintk("bond_arp_rcv: %s %s/%d av %d sv %d sip %u.%u.%u.%u" | |
2744 | " tip %u.%u.%u.%u\n", bond->dev->name, slave->dev->name, | |
2745 | slave->state, bond->params.arp_validate, | |
2746 | slave_do_arp_validate(bond, slave), NIPQUAD(sip), NIPQUAD(tip)); | |
2747 | ||
2748 | /* | |
2749 | * Backup slaves won't see the ARP reply, but do come through | |
2750 | * here for each ARP probe (so we swap the sip/tip to validate | |
2751 | * the probe). In a "redundant switch, common router" type of | |
2752 | * configuration, the ARP probe will (hopefully) travel from | |
2753 | * the active, through one switch, the router, then the other | |
2754 | * switch before reaching the backup. | |
2755 | */ | |
2756 | if (slave->state == BOND_STATE_ACTIVE) | |
2757 | bond_validate_arp(bond, slave, sip, tip); | |
2758 | else | |
2759 | bond_validate_arp(bond, slave, tip, sip); | |
2760 | ||
2761 | out_unlock: | |
2762 | read_unlock(&bond->lock); | |
2763 | out: | |
2764 | dev_kfree_skb(skb); | |
2765 | return NET_RX_SUCCESS; | |
2766 | } | |
2767 | ||
1da177e4 LT |
2768 | /* |
2769 | * this function is called regularly to monitor each slave's link | |
2770 | * ensuring that traffic is being sent and received when arp monitoring | |
2771 | * is used in load-balancing mode. if the adapter has been dormant, then an | |
2772 | * arp is transmitted to generate traffic. see activebackup_arp_monitor for | |
2773 | * arp monitoring in active backup mode. | |
2774 | */ | |
1b76b316 | 2775 | void bond_loadbalance_arp_mon(struct work_struct *work) |
1da177e4 | 2776 | { |
1b76b316 JV |
2777 | struct bonding *bond = container_of(work, struct bonding, |
2778 | arp_work.work); | |
1da177e4 LT |
2779 | struct slave *slave, *oldcurrent; |
2780 | int do_failover = 0; | |
2781 | int delta_in_ticks; | |
2782 | int i; | |
2783 | ||
2784 | read_lock(&bond->lock); | |
2785 | ||
5ce0da8f | 2786 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 LT |
2787 | |
2788 | if (bond->kill_timers) { | |
2789 | goto out; | |
2790 | } | |
2791 | ||
2792 | if (bond->slave_cnt == 0) { | |
2793 | goto re_arm; | |
2794 | } | |
2795 | ||
2796 | read_lock(&bond->curr_slave_lock); | |
2797 | oldcurrent = bond->curr_active_slave; | |
2798 | read_unlock(&bond->curr_slave_lock); | |
2799 | ||
2800 | /* see if any of the previous devices are up now (i.e. they have | |
2801 | * xmt and rcv traffic). the curr_active_slave does not come into | |
2802 | * the picture unless it is null. also, slave->jiffies is not needed | |
2803 | * here because we send an arp on each slave and give a slave as | |
2804 | * long as it needs to get the tx/rx within the delta. | |
2805 | * TODO: what about up/down delay in arp mode? it wasn't here before | |
2806 | * so it can wait | |
2807 | */ | |
2808 | bond_for_each_slave(bond, slave, i) { | |
2809 | if (slave->link != BOND_LINK_UP) { | |
b63bb739 DS |
2810 | if (time_before_eq(jiffies, slave->dev->trans_start + delta_in_ticks) && |
2811 | time_before_eq(jiffies, slave->dev->last_rx + delta_in_ticks)) { | |
1da177e4 LT |
2812 | |
2813 | slave->link = BOND_LINK_UP; | |
2814 | slave->state = BOND_STATE_ACTIVE; | |
2815 | ||
2816 | /* primary_slave has no meaning in round-robin | |
2817 | * mode. the window of a slave being up and | |
2818 | * curr_active_slave being null after enslaving | |
2819 | * is closed. | |
2820 | */ | |
2821 | if (!oldcurrent) { | |
2822 | printk(KERN_INFO DRV_NAME | |
2823 | ": %s: link status definitely " | |
2824 | "up for interface %s, ", | |
1b76b316 | 2825 | bond->dev->name, |
1da177e4 LT |
2826 | slave->dev->name); |
2827 | do_failover = 1; | |
2828 | } else { | |
2829 | printk(KERN_INFO DRV_NAME | |
2830 | ": %s: interface %s is now up\n", | |
1b76b316 | 2831 | bond->dev->name, |
1da177e4 LT |
2832 | slave->dev->name); |
2833 | } | |
2834 | } | |
2835 | } else { | |
2836 | /* slave->link == BOND_LINK_UP */ | |
2837 | ||
2838 | /* not all switches will respond to an arp request | |
2839 | * when the source ip is 0, so don't take the link down | |
2840 | * if we don't know our ip yet | |
2841 | */ | |
b63bb739 | 2842 | if (time_after_eq(jiffies, slave->dev->trans_start + 2*delta_in_ticks) || |
4b8a9239 | 2843 | (time_after_eq(jiffies, slave->dev->last_rx + 2*delta_in_ticks))) { |
1da177e4 LT |
2844 | |
2845 | slave->link = BOND_LINK_DOWN; | |
2846 | slave->state = BOND_STATE_BACKUP; | |
2847 | ||
2848 | if (slave->link_failure_count < UINT_MAX) { | |
2849 | slave->link_failure_count++; | |
2850 | } | |
2851 | ||
2852 | printk(KERN_INFO DRV_NAME | |
2853 | ": %s: interface %s is now down.\n", | |
1b76b316 | 2854 | bond->dev->name, |
1da177e4 LT |
2855 | slave->dev->name); |
2856 | ||
2857 | if (slave == oldcurrent) { | |
2858 | do_failover = 1; | |
2859 | } | |
2860 | } | |
2861 | } | |
2862 | ||
2863 | /* note: if switch is in round-robin mode, all links | |
2864 | * must tx arp to ensure all links rx an arp - otherwise | |
2865 | * links may oscillate or not come up at all; if switch is | |
2866 | * in something like xor mode, there is nothing we can | |
2867 | * do - all replies will be rx'ed on same link causing slaves | |
2868 | * to be unstable during low/no traffic periods | |
2869 | */ | |
2870 | if (IS_UP(slave->dev)) { | |
2871 | bond_arp_send_all(bond, slave); | |
2872 | } | |
2873 | } | |
2874 | ||
2875 | if (do_failover) { | |
059fe7a5 | 2876 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2877 | |
2878 | bond_select_active_slave(bond); | |
2879 | ||
059fe7a5 | 2880 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
2881 | } |
2882 | ||
2883 | re_arm: | |
1b76b316 JV |
2884 | if (bond->params.arp_interval) |
2885 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); | |
1da177e4 LT |
2886 | out: |
2887 | read_unlock(&bond->lock); | |
2888 | } | |
2889 | ||
2890 | /* | |
b2220cad JV |
2891 | * Called to inspect slaves for active-backup mode ARP monitor link state |
2892 | * changes. Sets new_link in slaves to specify what action should take | |
2893 | * place for the slave. Returns 0 if no changes are found, >0 if changes | |
2894 | * to link states must be committed. | |
2895 | * | |
2896 | * Called with bond->lock held for read. | |
1da177e4 | 2897 | */ |
b2220cad | 2898 | static int bond_ab_arp_inspect(struct bonding *bond, int delta_in_ticks) |
1da177e4 | 2899 | { |
1da177e4 | 2900 | struct slave *slave; |
b2220cad | 2901 | int i, commit = 0; |
1da177e4 | 2902 | |
b2220cad JV |
2903 | bond_for_each_slave(bond, slave, i) { |
2904 | slave->new_link = BOND_LINK_NOCHANGE; | |
1da177e4 | 2905 | |
b2220cad JV |
2906 | if (slave->link != BOND_LINK_UP) { |
2907 | if (time_before_eq(jiffies, slave_last_rx(bond, slave) + | |
2908 | delta_in_ticks)) { | |
2909 | slave->new_link = BOND_LINK_UP; | |
2910 | commit++; | |
2911 | } | |
1da177e4 | 2912 | |
b2220cad JV |
2913 | continue; |
2914 | } | |
1da177e4 | 2915 | |
b2220cad JV |
2916 | /* |
2917 | * Give slaves 2*delta after being enslaved or made | |
2918 | * active. This avoids bouncing, as the last receive | |
2919 | * times need a full ARP monitor cycle to be updated. | |
2920 | */ | |
2921 | if (!time_after_eq(jiffies, slave->jiffies + | |
2922 | 2 * delta_in_ticks)) | |
2923 | continue; | |
2924 | ||
2925 | /* | |
2926 | * Backup slave is down if: | |
2927 | * - No current_arp_slave AND | |
2928 | * - more than 3*delta since last receive AND | |
2929 | * - the bond has an IP address | |
2930 | * | |
2931 | * Note: a non-null current_arp_slave indicates | |
2932 | * the curr_active_slave went down and we are | |
2933 | * searching for a new one; under this condition | |
2934 | * we only take the curr_active_slave down - this | |
2935 | * gives each slave a chance to tx/rx traffic | |
2936 | * before being taken out | |
2937 | */ | |
2938 | if (slave->state == BOND_STATE_BACKUP && | |
2939 | !bond->current_arp_slave && | |
2940 | time_after(jiffies, slave_last_rx(bond, slave) + | |
2941 | 3 * delta_in_ticks)) { | |
2942 | slave->new_link = BOND_LINK_DOWN; | |
2943 | commit++; | |
2944 | } | |
2945 | ||
2946 | /* | |
2947 | * Active slave is down if: | |
2948 | * - more than 2*delta since transmitting OR | |
2949 | * - (more than 2*delta since receive AND | |
2950 | * the bond has an IP address) | |
2951 | */ | |
2952 | if ((slave->state == BOND_STATE_ACTIVE) && | |
2953 | (time_after_eq(jiffies, slave->dev->trans_start + | |
2954 | 2 * delta_in_ticks) || | |
2955 | (time_after_eq(jiffies, slave_last_rx(bond, slave) | |
2956 | + 2 * delta_in_ticks)))) { | |
2957 | slave->new_link = BOND_LINK_DOWN; | |
2958 | commit++; | |
2959 | } | |
1da177e4 LT |
2960 | } |
2961 | ||
b2220cad JV |
2962 | read_lock(&bond->curr_slave_lock); |
2963 | ||
2964 | /* | |
2965 | * Trigger a commit if the primary option setting has changed. | |
1da177e4 | 2966 | */ |
b2220cad JV |
2967 | if (bond->primary_slave && |
2968 | (bond->primary_slave != bond->curr_active_slave) && | |
2969 | (bond->primary_slave->link == BOND_LINK_UP)) | |
2970 | commit++; | |
1da177e4 | 2971 | |
b2220cad | 2972 | read_unlock(&bond->curr_slave_lock); |
1da177e4 | 2973 | |
b2220cad JV |
2974 | return commit; |
2975 | } | |
1da177e4 | 2976 | |
b2220cad JV |
2977 | /* |
2978 | * Called to commit link state changes noted by inspection step of | |
2979 | * active-backup mode ARP monitor. | |
2980 | * | |
2981 | * Called with RTNL and bond->lock for read. | |
2982 | */ | |
2983 | static void bond_ab_arp_commit(struct bonding *bond, int delta_in_ticks) | |
2984 | { | |
2985 | struct slave *slave; | |
2986 | int i; | |
1da177e4 | 2987 | |
b2220cad JV |
2988 | bond_for_each_slave(bond, slave, i) { |
2989 | switch (slave->new_link) { | |
2990 | case BOND_LINK_NOCHANGE: | |
2991 | continue; | |
ff59c456 | 2992 | |
b2220cad JV |
2993 | case BOND_LINK_UP: |
2994 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 | 2995 | |
b2220cad JV |
2996 | if (!bond->curr_active_slave && |
2997 | time_before_eq(jiffies, slave->dev->trans_start + | |
2998 | delta_in_ticks)) { | |
2999 | slave->link = BOND_LINK_UP; | |
3000 | bond_change_active_slave(bond, slave); | |
3001 | bond->current_arp_slave = NULL; | |
3002 | ||
3003 | printk(KERN_INFO DRV_NAME | |
3004 | ": %s: %s is up and now the " | |
3005 | "active interface\n", | |
3006 | bond->dev->name, slave->dev->name); | |
3007 | ||
3008 | } else if (bond->curr_active_slave != slave) { | |
3009 | /* this slave has just come up but we | |
3010 | * already have a current slave; this can | |
3011 | * also happen if bond_enslave adds a new | |
3012 | * slave that is up while we are searching | |
3013 | * for a new slave | |
1da177e4 | 3014 | */ |
b2220cad JV |
3015 | slave->link = BOND_LINK_UP; |
3016 | bond_set_slave_inactive_flags(slave); | |
3017 | bond->current_arp_slave = NULL; | |
3018 | ||
3019 | printk(KERN_INFO DRV_NAME | |
3020 | ": %s: backup interface %s is now up\n", | |
3021 | bond->dev->name, slave->dev->name); | |
3022 | } | |
1da177e4 | 3023 | |
b2220cad | 3024 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 | 3025 | |
b2220cad | 3026 | break; |
1da177e4 | 3027 | |
b2220cad JV |
3028 | case BOND_LINK_DOWN: |
3029 | if (slave->link_failure_count < UINT_MAX) | |
3030 | slave->link_failure_count++; | |
3031 | ||
3032 | slave->link = BOND_LINK_DOWN; | |
3033 | ||
3034 | if (slave == bond->curr_active_slave) { | |
3035 | printk(KERN_INFO DRV_NAME | |
3036 | ": %s: link status down for active " | |
3037 | "interface %s, disabling it\n", | |
3038 | bond->dev->name, slave->dev->name); | |
1da177e4 LT |
3039 | |
3040 | bond_set_slave_inactive_flags(slave); | |
3041 | ||
b2220cad JV |
3042 | write_lock_bh(&bond->curr_slave_lock); |
3043 | ||
3044 | bond_select_active_slave(bond); | |
3045 | if (bond->curr_active_slave) | |
3046 | bond->curr_active_slave->jiffies = | |
3047 | jiffies; | |
3048 | ||
3049 | write_unlock_bh(&bond->curr_slave_lock); | |
3050 | ||
3051 | bond->current_arp_slave = NULL; | |
3052 | ||
3053 | } else if (slave->state == BOND_STATE_BACKUP) { | |
1da177e4 LT |
3054 | printk(KERN_INFO DRV_NAME |
3055 | ": %s: backup interface %s is now down\n", | |
b2220cad JV |
3056 | bond->dev->name, slave->dev->name); |
3057 | ||
3058 | bond_set_slave_inactive_flags(slave); | |
1da177e4 | 3059 | } |
b2220cad JV |
3060 | break; |
3061 | ||
3062 | default: | |
3063 | printk(KERN_ERR DRV_NAME | |
3064 | ": %s: impossible: new_link %d on slave %s\n", | |
3065 | bond->dev->name, slave->new_link, | |
3066 | slave->dev->name); | |
1da177e4 LT |
3067 | } |
3068 | } | |
3069 | ||
b2220cad JV |
3070 | /* |
3071 | * No race with changes to primary via sysfs, as we hold rtnl. | |
3072 | */ | |
3073 | if (bond->primary_slave && | |
3074 | (bond->primary_slave != bond->curr_active_slave) && | |
3075 | (bond->primary_slave->link == BOND_LINK_UP)) { | |
3076 | write_lock_bh(&bond->curr_slave_lock); | |
3077 | bond_change_active_slave(bond, bond->primary_slave); | |
3078 | write_unlock_bh(&bond->curr_slave_lock); | |
3079 | } | |
1da177e4 | 3080 | |
b2220cad JV |
3081 | bond_set_carrier(bond); |
3082 | } | |
1da177e4 | 3083 | |
b2220cad JV |
3084 | /* |
3085 | * Send ARP probes for active-backup mode ARP monitor. | |
3086 | * | |
3087 | * Called with bond->lock held for read. | |
3088 | */ | |
3089 | static void bond_ab_arp_probe(struct bonding *bond) | |
3090 | { | |
3091 | struct slave *slave; | |
3092 | int i; | |
1da177e4 | 3093 | |
b2220cad | 3094 | read_lock(&bond->curr_slave_lock); |
1da177e4 | 3095 | |
b2220cad JV |
3096 | if (bond->current_arp_slave && bond->curr_active_slave) |
3097 | printk("PROBE: c_arp %s && cas %s BAD\n", | |
3098 | bond->current_arp_slave->dev->name, | |
3099 | bond->curr_active_slave->dev->name); | |
1da177e4 | 3100 | |
b2220cad JV |
3101 | if (bond->curr_active_slave) { |
3102 | bond_arp_send_all(bond, bond->curr_active_slave); | |
3103 | read_unlock(&bond->curr_slave_lock); | |
3104 | return; | |
3105 | } | |
1da177e4 | 3106 | |
b2220cad | 3107 | read_unlock(&bond->curr_slave_lock); |
059fe7a5 | 3108 | |
b2220cad JV |
3109 | /* if we don't have a curr_active_slave, search for the next available |
3110 | * backup slave from the current_arp_slave and make it the candidate | |
3111 | * for becoming the curr_active_slave | |
3112 | */ | |
1da177e4 | 3113 | |
b2220cad JV |
3114 | if (!bond->current_arp_slave) { |
3115 | bond->current_arp_slave = bond->first_slave; | |
3116 | if (!bond->current_arp_slave) | |
3117 | return; | |
3118 | } | |
1da177e4 | 3119 | |
b2220cad | 3120 | bond_set_slave_inactive_flags(bond->current_arp_slave); |
059fe7a5 | 3121 | |
b2220cad JV |
3122 | /* search for next candidate */ |
3123 | bond_for_each_slave_from(bond, slave, i, bond->current_arp_slave->next) { | |
3124 | if (IS_UP(slave->dev)) { | |
3125 | slave->link = BOND_LINK_BACK; | |
3126 | bond_set_slave_active_flags(slave); | |
3127 | bond_arp_send_all(bond, slave); | |
1da177e4 | 3128 | slave->jiffies = jiffies; |
b2220cad JV |
3129 | bond->current_arp_slave = slave; |
3130 | break; | |
1da177e4 LT |
3131 | } |
3132 | ||
b2220cad JV |
3133 | /* if the link state is up at this point, we |
3134 | * mark it down - this can happen if we have | |
3135 | * simultaneous link failures and | |
3136 | * reselect_active_interface doesn't make this | |
3137 | * one the current slave so it is still marked | |
3138 | * up when it is actually down | |
1da177e4 | 3139 | */ |
b2220cad JV |
3140 | if (slave->link == BOND_LINK_UP) { |
3141 | slave->link = BOND_LINK_DOWN; | |
3142 | if (slave->link_failure_count < UINT_MAX) | |
3143 | slave->link_failure_count++; | |
1da177e4 | 3144 | |
b2220cad JV |
3145 | bond_set_slave_inactive_flags(slave); |
3146 | ||
3147 | printk(KERN_INFO DRV_NAME | |
3148 | ": %s: backup interface %s is now down.\n", | |
3149 | bond->dev->name, slave->dev->name); | |
1da177e4 | 3150 | } |
b2220cad JV |
3151 | } |
3152 | } | |
1da177e4 | 3153 | |
b2220cad JV |
3154 | void bond_activebackup_arp_mon(struct work_struct *work) |
3155 | { | |
3156 | struct bonding *bond = container_of(work, struct bonding, | |
3157 | arp_work.work); | |
3158 | int delta_in_ticks; | |
1da177e4 | 3159 | |
b2220cad | 3160 | read_lock(&bond->lock); |
1da177e4 | 3161 | |
b2220cad JV |
3162 | if (bond->kill_timers) |
3163 | goto out; | |
1da177e4 | 3164 | |
b2220cad | 3165 | delta_in_ticks = msecs_to_jiffies(bond->params.arp_interval); |
1da177e4 | 3166 | |
b2220cad JV |
3167 | if (bond->slave_cnt == 0) |
3168 | goto re_arm; | |
3169 | ||
b59f9f74 JV |
3170 | if (bond->send_grat_arp) { |
3171 | read_lock(&bond->curr_slave_lock); | |
3172 | bond_send_gratuitous_arp(bond); | |
3173 | read_unlock(&bond->curr_slave_lock); | |
3174 | } | |
3175 | ||
b2220cad JV |
3176 | if (bond_ab_arp_inspect(bond, delta_in_ticks)) { |
3177 | read_unlock(&bond->lock); | |
3178 | rtnl_lock(); | |
3179 | read_lock(&bond->lock); | |
3180 | ||
3181 | bond_ab_arp_commit(bond, delta_in_ticks); | |
3182 | ||
3183 | read_unlock(&bond->lock); | |
3184 | rtnl_unlock(); | |
3185 | read_lock(&bond->lock); | |
1da177e4 LT |
3186 | } |
3187 | ||
b2220cad JV |
3188 | bond_ab_arp_probe(bond); |
3189 | ||
1da177e4 LT |
3190 | re_arm: |
3191 | if (bond->params.arp_interval) { | |
1b76b316 | 3192 | queue_delayed_work(bond->wq, &bond->arp_work, delta_in_ticks); |
1da177e4 LT |
3193 | } |
3194 | out: | |
3195 | read_unlock(&bond->lock); | |
3196 | } | |
3197 | ||
3198 | /*------------------------------ proc/seq_file-------------------------------*/ | |
3199 | ||
3200 | #ifdef CONFIG_PROC_FS | |
3201 | ||
1da177e4 LT |
3202 | static void *bond_info_seq_start(struct seq_file *seq, loff_t *pos) |
3203 | { | |
3204 | struct bonding *bond = seq->private; | |
3205 | loff_t off = 0; | |
3206 | struct slave *slave; | |
3207 | int i; | |
3208 | ||
3209 | /* make sure the bond won't be taken away */ | |
3210 | read_lock(&dev_base_lock); | |
6603a6f2 | 3211 | read_lock(&bond->lock); |
1da177e4 LT |
3212 | |
3213 | if (*pos == 0) { | |
3214 | return SEQ_START_TOKEN; | |
3215 | } | |
3216 | ||
3217 | bond_for_each_slave(bond, slave, i) { | |
3218 | if (++off == *pos) { | |
3219 | return slave; | |
3220 | } | |
3221 | } | |
3222 | ||
3223 | return NULL; | |
3224 | } | |
3225 | ||
3226 | static void *bond_info_seq_next(struct seq_file *seq, void *v, loff_t *pos) | |
3227 | { | |
3228 | struct bonding *bond = seq->private; | |
3229 | struct slave *slave = v; | |
3230 | ||
3231 | ++*pos; | |
3232 | if (v == SEQ_START_TOKEN) { | |
3233 | return bond->first_slave; | |
3234 | } | |
3235 | ||
3236 | slave = slave->next; | |
3237 | ||
3238 | return (slave == bond->first_slave) ? NULL : slave; | |
3239 | } | |
3240 | ||
3241 | static void bond_info_seq_stop(struct seq_file *seq, void *v) | |
3242 | { | |
3243 | struct bonding *bond = seq->private; | |
3244 | ||
6603a6f2 | 3245 | read_unlock(&bond->lock); |
1da177e4 LT |
3246 | read_unlock(&dev_base_lock); |
3247 | } | |
3248 | ||
3249 | static void bond_info_show_master(struct seq_file *seq) | |
3250 | { | |
3251 | struct bonding *bond = seq->private; | |
3252 | struct slave *curr; | |
4756b02f MW |
3253 | int i; |
3254 | u32 target; | |
1da177e4 LT |
3255 | |
3256 | read_lock(&bond->curr_slave_lock); | |
3257 | curr = bond->curr_active_slave; | |
3258 | read_unlock(&bond->curr_slave_lock); | |
3259 | ||
dd957c57 | 3260 | seq_printf(seq, "Bonding Mode: %s", |
1da177e4 LT |
3261 | bond_mode_name(bond->params.mode)); |
3262 | ||
dd957c57 JV |
3263 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP && |
3264 | bond->params.fail_over_mac) | |
3915c1e8 JV |
3265 | seq_printf(seq, " (fail_over_mac %s)", |
3266 | fail_over_mac_tbl[bond->params.fail_over_mac].modename); | |
dd957c57 JV |
3267 | |
3268 | seq_printf(seq, "\n"); | |
3269 | ||
c61b75ad MW |
3270 | if (bond->params.mode == BOND_MODE_XOR || |
3271 | bond->params.mode == BOND_MODE_8023AD) { | |
3272 | seq_printf(seq, "Transmit Hash Policy: %s (%d)\n", | |
3273 | xmit_hashtype_tbl[bond->params.xmit_policy].modename, | |
3274 | bond->params.xmit_policy); | |
3275 | } | |
3276 | ||
1da177e4 LT |
3277 | if (USES_PRIMARY(bond->params.mode)) { |
3278 | seq_printf(seq, "Primary Slave: %s\n", | |
0f418b2a MW |
3279 | (bond->primary_slave) ? |
3280 | bond->primary_slave->dev->name : "None"); | |
1da177e4 LT |
3281 | |
3282 | seq_printf(seq, "Currently Active Slave: %s\n", | |
3283 | (curr) ? curr->dev->name : "None"); | |
3284 | } | |
3285 | ||
ff59c456 JV |
3286 | seq_printf(seq, "MII Status: %s\n", netif_carrier_ok(bond->dev) ? |
3287 | "up" : "down"); | |
1da177e4 LT |
3288 | seq_printf(seq, "MII Polling Interval (ms): %d\n", bond->params.miimon); |
3289 | seq_printf(seq, "Up Delay (ms): %d\n", | |
3290 | bond->params.updelay * bond->params.miimon); | |
3291 | seq_printf(seq, "Down Delay (ms): %d\n", | |
3292 | bond->params.downdelay * bond->params.miimon); | |
3293 | ||
4756b02f MW |
3294 | |
3295 | /* ARP information */ | |
3296 | if(bond->params.arp_interval > 0) { | |
3297 | int printed=0; | |
3298 | seq_printf(seq, "ARP Polling Interval (ms): %d\n", | |
3299 | bond->params.arp_interval); | |
3300 | ||
3301 | seq_printf(seq, "ARP IP target/s (n.n.n.n form):"); | |
3302 | ||
3303 | for(i = 0; (i < BOND_MAX_ARP_TARGETS) ;i++) { | |
3304 | if (!bond->params.arp_targets[i]) | |
3305 | continue; | |
3306 | if (printed) | |
3307 | seq_printf(seq, ","); | |
3308 | target = ntohl(bond->params.arp_targets[i]); | |
3309 | seq_printf(seq, " %d.%d.%d.%d", HIPQUAD(target)); | |
3310 | printed = 1; | |
3311 | } | |
3312 | seq_printf(seq, "\n"); | |
3313 | } | |
3314 | ||
1da177e4 LT |
3315 | if (bond->params.mode == BOND_MODE_8023AD) { |
3316 | struct ad_info ad_info; | |
0795af57 | 3317 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
3318 | |
3319 | seq_puts(seq, "\n802.3ad info\n"); | |
3320 | seq_printf(seq, "LACP rate: %s\n", | |
3321 | (bond->params.lacp_fast) ? "fast" : "slow"); | |
3322 | ||
3323 | if (bond_3ad_get_active_agg_info(bond, &ad_info)) { | |
3324 | seq_printf(seq, "bond %s has no active aggregator\n", | |
3325 | bond->dev->name); | |
3326 | } else { | |
3327 | seq_printf(seq, "Active Aggregator Info:\n"); | |
3328 | ||
3329 | seq_printf(seq, "\tAggregator ID: %d\n", | |
3330 | ad_info.aggregator_id); | |
3331 | seq_printf(seq, "\tNumber of ports: %d\n", | |
3332 | ad_info.ports); | |
3333 | seq_printf(seq, "\tActor Key: %d\n", | |
3334 | ad_info.actor_key); | |
3335 | seq_printf(seq, "\tPartner Key: %d\n", | |
3336 | ad_info.partner_key); | |
0795af57 JP |
3337 | seq_printf(seq, "\tPartner Mac Address: %s\n", |
3338 | print_mac(mac, ad_info.partner_system)); | |
1da177e4 LT |
3339 | } |
3340 | } | |
3341 | } | |
3342 | ||
3343 | static void bond_info_show_slave(struct seq_file *seq, const struct slave *slave) | |
3344 | { | |
3345 | struct bonding *bond = seq->private; | |
0795af57 | 3346 | DECLARE_MAC_BUF(mac); |
1da177e4 LT |
3347 | |
3348 | seq_printf(seq, "\nSlave Interface: %s\n", slave->dev->name); | |
3349 | seq_printf(seq, "MII Status: %s\n", | |
3350 | (slave->link == BOND_LINK_UP) ? "up" : "down"); | |
65509645 | 3351 | seq_printf(seq, "Link Failure Count: %u\n", |
1da177e4 LT |
3352 | slave->link_failure_count); |
3353 | ||
217df670 | 3354 | seq_printf(seq, |
0795af57 JP |
3355 | "Permanent HW addr: %s\n", |
3356 | print_mac(mac, slave->perm_hwaddr)); | |
1da177e4 LT |
3357 | |
3358 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3359 | const struct aggregator *agg | |
3360 | = SLAVE_AD_INFO(slave).port.aggregator; | |
3361 | ||
3362 | if (agg) { | |
3363 | seq_printf(seq, "Aggregator ID: %d\n", | |
3364 | agg->aggregator_identifier); | |
3365 | } else { | |
3366 | seq_puts(seq, "Aggregator ID: N/A\n"); | |
3367 | } | |
3368 | } | |
3369 | } | |
3370 | ||
3371 | static int bond_info_seq_show(struct seq_file *seq, void *v) | |
3372 | { | |
3373 | if (v == SEQ_START_TOKEN) { | |
3374 | seq_printf(seq, "%s\n", version); | |
3375 | bond_info_show_master(seq); | |
3376 | } else { | |
3377 | bond_info_show_slave(seq, v); | |
3378 | } | |
3379 | ||
3380 | return 0; | |
3381 | } | |
3382 | ||
3383 | static struct seq_operations bond_info_seq_ops = { | |
3384 | .start = bond_info_seq_start, | |
3385 | .next = bond_info_seq_next, | |
3386 | .stop = bond_info_seq_stop, | |
3387 | .show = bond_info_seq_show, | |
3388 | }; | |
3389 | ||
3390 | static int bond_info_open(struct inode *inode, struct file *file) | |
3391 | { | |
3392 | struct seq_file *seq; | |
3393 | struct proc_dir_entry *proc; | |
3394 | int res; | |
3395 | ||
3396 | res = seq_open(file, &bond_info_seq_ops); | |
3397 | if (!res) { | |
3398 | /* recover the pointer buried in proc_dir_entry data */ | |
3399 | seq = file->private_data; | |
3400 | proc = PDE(inode); | |
3401 | seq->private = proc->data; | |
3402 | } | |
3403 | ||
3404 | return res; | |
3405 | } | |
3406 | ||
d54b1fdb | 3407 | static const struct file_operations bond_info_fops = { |
1da177e4 LT |
3408 | .owner = THIS_MODULE, |
3409 | .open = bond_info_open, | |
3410 | .read = seq_read, | |
3411 | .llseek = seq_lseek, | |
3412 | .release = seq_release, | |
3413 | }; | |
3414 | ||
3415 | static int bond_create_proc_entry(struct bonding *bond) | |
3416 | { | |
3417 | struct net_device *bond_dev = bond->dev; | |
3418 | ||
3419 | if (bond_proc_dir) { | |
a95609cb DL |
3420 | bond->proc_entry = proc_create_data(bond_dev->name, |
3421 | S_IRUGO, bond_proc_dir, | |
3422 | &bond_info_fops, bond); | |
1da177e4 LT |
3423 | if (bond->proc_entry == NULL) { |
3424 | printk(KERN_WARNING DRV_NAME | |
3425 | ": Warning: Cannot create /proc/net/%s/%s\n", | |
3426 | DRV_NAME, bond_dev->name); | |
3427 | } else { | |
1da177e4 LT |
3428 | memcpy(bond->proc_file_name, bond_dev->name, IFNAMSIZ); |
3429 | } | |
3430 | } | |
3431 | ||
3432 | return 0; | |
3433 | } | |
3434 | ||
3435 | static void bond_remove_proc_entry(struct bonding *bond) | |
3436 | { | |
3437 | if (bond_proc_dir && bond->proc_entry) { | |
3438 | remove_proc_entry(bond->proc_file_name, bond_proc_dir); | |
3439 | memset(bond->proc_file_name, 0, IFNAMSIZ); | |
3440 | bond->proc_entry = NULL; | |
3441 | } | |
3442 | } | |
3443 | ||
3444 | /* Create the bonding directory under /proc/net, if doesn't exist yet. | |
3445 | * Caller must hold rtnl_lock. | |
3446 | */ | |
3447 | static void bond_create_proc_dir(void) | |
3448 | { | |
3449 | int len = strlen(DRV_NAME); | |
3450 | ||
457c4cbc | 3451 | for (bond_proc_dir = init_net.proc_net->subdir; bond_proc_dir; |
1da177e4 LT |
3452 | bond_proc_dir = bond_proc_dir->next) { |
3453 | if ((bond_proc_dir->namelen == len) && | |
3454 | !memcmp(bond_proc_dir->name, DRV_NAME, len)) { | |
3455 | break; | |
3456 | } | |
3457 | } | |
3458 | ||
3459 | if (!bond_proc_dir) { | |
457c4cbc | 3460 | bond_proc_dir = proc_mkdir(DRV_NAME, init_net.proc_net); |
1da177e4 LT |
3461 | if (bond_proc_dir) { |
3462 | bond_proc_dir->owner = THIS_MODULE; | |
3463 | } else { | |
3464 | printk(KERN_WARNING DRV_NAME | |
3465 | ": Warning: cannot create /proc/net/%s\n", | |
3466 | DRV_NAME); | |
3467 | } | |
3468 | } | |
3469 | } | |
3470 | ||
3471 | /* Destroy the bonding directory under /proc/net, if empty. | |
3472 | * Caller must hold rtnl_lock. | |
3473 | */ | |
3474 | static void bond_destroy_proc_dir(void) | |
3475 | { | |
3476 | struct proc_dir_entry *de; | |
3477 | ||
3478 | if (!bond_proc_dir) { | |
3479 | return; | |
3480 | } | |
3481 | ||
3482 | /* verify that the /proc dir is empty */ | |
3483 | for (de = bond_proc_dir->subdir; de; de = de->next) { | |
3484 | /* ignore . and .. */ | |
3485 | if (*(de->name) != '.') { | |
3486 | break; | |
3487 | } | |
3488 | } | |
3489 | ||
3490 | if (de) { | |
3491 | if (bond_proc_dir->owner == THIS_MODULE) { | |
3492 | bond_proc_dir->owner = NULL; | |
3493 | } | |
3494 | } else { | |
457c4cbc | 3495 | remove_proc_entry(DRV_NAME, init_net.proc_net); |
1da177e4 LT |
3496 | bond_proc_dir = NULL; |
3497 | } | |
3498 | } | |
3499 | #endif /* CONFIG_PROC_FS */ | |
3500 | ||
3501 | /*-------------------------- netdev event handling --------------------------*/ | |
3502 | ||
3503 | /* | |
3504 | * Change device name | |
3505 | */ | |
3506 | static int bond_event_changename(struct bonding *bond) | |
3507 | { | |
3508 | #ifdef CONFIG_PROC_FS | |
3509 | bond_remove_proc_entry(bond); | |
3510 | bond_create_proc_entry(bond); | |
3511 | #endif | |
b76cdba9 MW |
3512 | down_write(&(bonding_rwsem)); |
3513 | bond_destroy_sysfs_entry(bond); | |
3514 | bond_create_sysfs_entry(bond); | |
3515 | up_write(&(bonding_rwsem)); | |
1da177e4 LT |
3516 | return NOTIFY_DONE; |
3517 | } | |
3518 | ||
3519 | static int bond_master_netdev_event(unsigned long event, struct net_device *bond_dev) | |
3520 | { | |
3521 | struct bonding *event_bond = bond_dev->priv; | |
3522 | ||
3523 | switch (event) { | |
3524 | case NETDEV_CHANGENAME: | |
3525 | return bond_event_changename(event_bond); | |
3526 | case NETDEV_UNREGISTER: | |
3b96c858 | 3527 | bond_release_all(event_bond->dev); |
1da177e4 LT |
3528 | break; |
3529 | default: | |
3530 | break; | |
3531 | } | |
3532 | ||
3533 | return NOTIFY_DONE; | |
3534 | } | |
3535 | ||
3536 | static int bond_slave_netdev_event(unsigned long event, struct net_device *slave_dev) | |
3537 | { | |
3538 | struct net_device *bond_dev = slave_dev->master; | |
8531c5ff | 3539 | struct bonding *bond = bond_dev->priv; |
1da177e4 LT |
3540 | |
3541 | switch (event) { | |
3542 | case NETDEV_UNREGISTER: | |
3543 | if (bond_dev) { | |
1284cd3a JV |
3544 | if (bond->setup_by_slave) |
3545 | bond_release_and_destroy(bond_dev, slave_dev); | |
3546 | else | |
3547 | bond_release(bond_dev, slave_dev); | |
1da177e4 LT |
3548 | } |
3549 | break; | |
3550 | case NETDEV_CHANGE: | |
3551 | /* | |
3552 | * TODO: is this what we get if somebody | |
3553 | * sets up a hierarchical bond, then rmmod's | |
3554 | * one of the slave bonding devices? | |
3555 | */ | |
3556 | break; | |
3557 | case NETDEV_DOWN: | |
3558 | /* | |
3559 | * ... Or is it this? | |
3560 | */ | |
3561 | break; | |
3562 | case NETDEV_CHANGEMTU: | |
3563 | /* | |
3564 | * TODO: Should slaves be allowed to | |
3565 | * independently alter their MTU? For | |
3566 | * an active-backup bond, slaves need | |
3567 | * not be the same type of device, so | |
3568 | * MTUs may vary. For other modes, | |
3569 | * slaves arguably should have the | |
3570 | * same MTUs. To do this, we'd need to | |
3571 | * take over the slave's change_mtu | |
3572 | * function for the duration of their | |
3573 | * servitude. | |
3574 | */ | |
3575 | break; | |
3576 | case NETDEV_CHANGENAME: | |
3577 | /* | |
3578 | * TODO: handle changing the primary's name | |
3579 | */ | |
3580 | break; | |
8531c5ff AK |
3581 | case NETDEV_FEAT_CHANGE: |
3582 | bond_compute_features(bond); | |
3583 | break; | |
1da177e4 LT |
3584 | default: |
3585 | break; | |
3586 | } | |
3587 | ||
3588 | return NOTIFY_DONE; | |
3589 | } | |
3590 | ||
3591 | /* | |
3592 | * bond_netdev_event: handle netdev notifier chain events. | |
3593 | * | |
3594 | * This function receives events for the netdev chain. The caller (an | |
e041c683 | 3595 | * ioctl handler calling blocking_notifier_call_chain) holds the necessary |
1da177e4 LT |
3596 | * locks for us to safely manipulate the slave devices (RTNL lock, |
3597 | * dev_probe_lock). | |
3598 | */ | |
3599 | static int bond_netdev_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3600 | { | |
3601 | struct net_device *event_dev = (struct net_device *)ptr; | |
3602 | ||
c346dca1 | 3603 | if (dev_net(event_dev) != &init_net) |
e9dc8653 EB |
3604 | return NOTIFY_DONE; |
3605 | ||
1da177e4 LT |
3606 | dprintk("event_dev: %s, event: %lx\n", |
3607 | (event_dev ? event_dev->name : "None"), | |
3608 | event); | |
3609 | ||
0b680e75 JV |
3610 | if (!(event_dev->priv_flags & IFF_BONDING)) |
3611 | return NOTIFY_DONE; | |
3612 | ||
1da177e4 LT |
3613 | if (event_dev->flags & IFF_MASTER) { |
3614 | dprintk("IFF_MASTER\n"); | |
3615 | return bond_master_netdev_event(event, event_dev); | |
3616 | } | |
3617 | ||
3618 | if (event_dev->flags & IFF_SLAVE) { | |
3619 | dprintk("IFF_SLAVE\n"); | |
3620 | return bond_slave_netdev_event(event, event_dev); | |
3621 | } | |
3622 | ||
3623 | return NOTIFY_DONE; | |
3624 | } | |
3625 | ||
c3ade5ca JV |
3626 | /* |
3627 | * bond_inetaddr_event: handle inetaddr notifier chain events. | |
3628 | * | |
3629 | * We keep track of device IPs primarily to use as source addresses in | |
3630 | * ARP monitor probes (rather than spewing out broadcasts all the time). | |
3631 | * | |
3632 | * We track one IP for the main device (if it has one), plus one per VLAN. | |
3633 | */ | |
3634 | static int bond_inetaddr_event(struct notifier_block *this, unsigned long event, void *ptr) | |
3635 | { | |
3636 | struct in_ifaddr *ifa = ptr; | |
3637 | struct net_device *vlan_dev, *event_dev = ifa->ifa_dev->dev; | |
0883beca PE |
3638 | struct bonding *bond; |
3639 | struct vlan_entry *vlan; | |
c3ade5ca | 3640 | |
c346dca1 | 3641 | if (dev_net(ifa->ifa_dev->dev) != &init_net) |
6133fb1a DL |
3642 | return NOTIFY_DONE; |
3643 | ||
0883beca | 3644 | list_for_each_entry(bond, &bond_dev_list, bond_list) { |
c3ade5ca JV |
3645 | if (bond->dev == event_dev) { |
3646 | switch (event) { | |
3647 | case NETDEV_UP: | |
3648 | bond->master_ip = ifa->ifa_local; | |
3649 | return NOTIFY_OK; | |
3650 | case NETDEV_DOWN: | |
3651 | bond->master_ip = bond_glean_dev_ip(bond->dev); | |
3652 | return NOTIFY_OK; | |
3653 | default: | |
3654 | return NOTIFY_DONE; | |
3655 | } | |
3656 | } | |
3657 | ||
0883beca | 3658 | list_for_each_entry(vlan, &bond->vlan_list, vlan_list) { |
5c15bdec | 3659 | vlan_dev = vlan_group_get_device(bond->vlgrp, vlan->vlan_id); |
c3ade5ca JV |
3660 | if (vlan_dev == event_dev) { |
3661 | switch (event) { | |
3662 | case NETDEV_UP: | |
3663 | vlan->vlan_ip = ifa->ifa_local; | |
3664 | return NOTIFY_OK; | |
3665 | case NETDEV_DOWN: | |
3666 | vlan->vlan_ip = | |
3667 | bond_glean_dev_ip(vlan_dev); | |
3668 | return NOTIFY_OK; | |
3669 | default: | |
3670 | return NOTIFY_DONE; | |
3671 | } | |
3672 | } | |
3673 | } | |
3674 | } | |
3675 | return NOTIFY_DONE; | |
3676 | } | |
3677 | ||
1da177e4 LT |
3678 | static struct notifier_block bond_netdev_notifier = { |
3679 | .notifier_call = bond_netdev_event, | |
3680 | }; | |
3681 | ||
c3ade5ca JV |
3682 | static struct notifier_block bond_inetaddr_notifier = { |
3683 | .notifier_call = bond_inetaddr_event, | |
3684 | }; | |
3685 | ||
1da177e4 LT |
3686 | /*-------------------------- Packet type handling ---------------------------*/ |
3687 | ||
3688 | /* register to receive lacpdus on a bond */ | |
3689 | static void bond_register_lacpdu(struct bonding *bond) | |
3690 | { | |
3691 | struct packet_type *pk_type = &(BOND_AD_INFO(bond).ad_pkt_type); | |
3692 | ||
3693 | /* initialize packet type */ | |
3694 | pk_type->type = PKT_TYPE_LACPDU; | |
3695 | pk_type->dev = bond->dev; | |
3696 | pk_type->func = bond_3ad_lacpdu_recv; | |
3697 | ||
3698 | dev_add_pack(pk_type); | |
3699 | } | |
3700 | ||
3701 | /* unregister to receive lacpdus on a bond */ | |
3702 | static void bond_unregister_lacpdu(struct bonding *bond) | |
3703 | { | |
3704 | dev_remove_pack(&(BOND_AD_INFO(bond).ad_pkt_type)); | |
3705 | } | |
3706 | ||
f5b2b966 JV |
3707 | void bond_register_arp(struct bonding *bond) |
3708 | { | |
3709 | struct packet_type *pt = &bond->arp_mon_pt; | |
3710 | ||
c4f283b1 JV |
3711 | if (pt->type) |
3712 | return; | |
3713 | ||
f5b2b966 | 3714 | pt->type = htons(ETH_P_ARP); |
e245cb71 | 3715 | pt->dev = bond->dev; |
f5b2b966 JV |
3716 | pt->func = bond_arp_rcv; |
3717 | dev_add_pack(pt); | |
3718 | } | |
3719 | ||
3720 | void bond_unregister_arp(struct bonding *bond) | |
3721 | { | |
c4f283b1 JV |
3722 | struct packet_type *pt = &bond->arp_mon_pt; |
3723 | ||
3724 | dev_remove_pack(pt); | |
3725 | pt->type = 0; | |
f5b2b966 JV |
3726 | } |
3727 | ||
169a3e66 JV |
3728 | /*---------------------------- Hashing Policies -----------------------------*/ |
3729 | ||
6f6652be JV |
3730 | /* |
3731 | * Hash for the output device based upon layer 2 and layer 3 data. If | |
3732 | * the packet is not IP mimic bond_xmit_hash_policy_l2() | |
3733 | */ | |
3734 | static int bond_xmit_hash_policy_l23(struct sk_buff *skb, | |
3735 | struct net_device *bond_dev, int count) | |
3736 | { | |
3737 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3738 | struct iphdr *iph = ip_hdr(skb); | |
3739 | ||
3740 | if (skb->protocol == __constant_htons(ETH_P_IP)) { | |
3741 | return ((ntohl(iph->saddr ^ iph->daddr) & 0xffff) ^ | |
3742 | (data->h_dest[5] ^ bond_dev->dev_addr[5])) % count; | |
3743 | } | |
3744 | ||
3745 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3746 | } | |
3747 | ||
169a3e66 | 3748 | /* |
59c51591 | 3749 | * Hash for the output device based upon layer 3 and layer 4 data. If |
169a3e66 JV |
3750 | * the packet is a frag or not TCP or UDP, just use layer 3 data. If it is |
3751 | * altogether not IP, mimic bond_xmit_hash_policy_l2() | |
3752 | */ | |
3753 | static int bond_xmit_hash_policy_l34(struct sk_buff *skb, | |
3754 | struct net_device *bond_dev, int count) | |
3755 | { | |
3756 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
eddc9ec5 | 3757 | struct iphdr *iph = ip_hdr(skb); |
d3bb52b0 | 3758 | __be16 *layer4hdr = (__be16 *)((u32 *)iph + iph->ihl); |
169a3e66 JV |
3759 | int layer4_xor = 0; |
3760 | ||
3761 | if (skb->protocol == __constant_htons(ETH_P_IP)) { | |
3762 | if (!(iph->frag_off & __constant_htons(IP_MF|IP_OFFSET)) && | |
3763 | (iph->protocol == IPPROTO_TCP || | |
3764 | iph->protocol == IPPROTO_UDP)) { | |
d3bb52b0 | 3765 | layer4_xor = ntohs((*layer4hdr ^ *(layer4hdr + 1))); |
169a3e66 JV |
3766 | } |
3767 | return (layer4_xor ^ | |
3768 | ((ntohl(iph->saddr ^ iph->daddr)) & 0xffff)) % count; | |
3769 | ||
3770 | } | |
3771 | ||
3772 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3773 | } | |
3774 | ||
3775 | /* | |
3776 | * Hash for the output device based upon layer 2 data | |
3777 | */ | |
3778 | static int bond_xmit_hash_policy_l2(struct sk_buff *skb, | |
3779 | struct net_device *bond_dev, int count) | |
3780 | { | |
3781 | struct ethhdr *data = (struct ethhdr *)skb->data; | |
3782 | ||
3783 | return (data->h_dest[5] ^ bond_dev->dev_addr[5]) % count; | |
3784 | } | |
3785 | ||
1da177e4 LT |
3786 | /*-------------------------- Device entry points ----------------------------*/ |
3787 | ||
3788 | static int bond_open(struct net_device *bond_dev) | |
3789 | { | |
3790 | struct bonding *bond = bond_dev->priv; | |
1da177e4 LT |
3791 | |
3792 | bond->kill_timers = 0; | |
3793 | ||
3794 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3795 | (bond->params.mode == BOND_MODE_ALB)) { | |
1da177e4 LT |
3796 | /* bond_alb_initialize must be called before the timer |
3797 | * is started. | |
3798 | */ | |
3799 | if (bond_alb_initialize(bond, (bond->params.mode == BOND_MODE_ALB))) { | |
3800 | /* something went wrong - fail the open operation */ | |
3801 | return -1; | |
3802 | } | |
3803 | ||
1b76b316 JV |
3804 | INIT_DELAYED_WORK(&bond->alb_work, bond_alb_monitor); |
3805 | queue_delayed_work(bond->wq, &bond->alb_work, 0); | |
1da177e4 LT |
3806 | } |
3807 | ||
3808 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ | |
1b76b316 JV |
3809 | INIT_DELAYED_WORK(&bond->mii_work, bond_mii_monitor); |
3810 | queue_delayed_work(bond->wq, &bond->mii_work, 0); | |
1da177e4 LT |
3811 | } |
3812 | ||
3813 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 JV |
3814 | if (bond->params.mode == BOND_MODE_ACTIVEBACKUP) |
3815 | INIT_DELAYED_WORK(&bond->arp_work, | |
3816 | bond_activebackup_arp_mon); | |
3817 | else | |
3818 | INIT_DELAYED_WORK(&bond->arp_work, | |
3819 | bond_loadbalance_arp_mon); | |
3820 | ||
3821 | queue_delayed_work(bond->wq, &bond->arp_work, 0); | |
f5b2b966 JV |
3822 | if (bond->params.arp_validate) |
3823 | bond_register_arp(bond); | |
1da177e4 LT |
3824 | } |
3825 | ||
3826 | if (bond->params.mode == BOND_MODE_8023AD) { | |
a40745f5 | 3827 | INIT_DELAYED_WORK(&bond->ad_work, bond_3ad_state_machine_handler); |
1b76b316 | 3828 | queue_delayed_work(bond->wq, &bond->ad_work, 0); |
1da177e4 LT |
3829 | /* register to receive LACPDUs */ |
3830 | bond_register_lacpdu(bond); | |
3831 | } | |
3832 | ||
3833 | return 0; | |
3834 | } | |
3835 | ||
3836 | static int bond_close(struct net_device *bond_dev) | |
3837 | { | |
3838 | struct bonding *bond = bond_dev->priv; | |
3839 | ||
3840 | if (bond->params.mode == BOND_MODE_8023AD) { | |
3841 | /* Unregister the receive of LACPDUs */ | |
3842 | bond_unregister_lacpdu(bond); | |
3843 | } | |
3844 | ||
f5b2b966 JV |
3845 | if (bond->params.arp_validate) |
3846 | bond_unregister_arp(bond); | |
3847 | ||
1da177e4 LT |
3848 | write_lock_bh(&bond->lock); |
3849 | ||
b59f9f74 | 3850 | bond->send_grat_arp = 0; |
1da177e4 LT |
3851 | |
3852 | /* signal timers not to re-arm */ | |
3853 | bond->kill_timers = 1; | |
3854 | ||
3855 | write_unlock_bh(&bond->lock); | |
3856 | ||
1da177e4 | 3857 | if (bond->params.miimon) { /* link check interval, in milliseconds. */ |
1b76b316 | 3858 | cancel_delayed_work(&bond->mii_work); |
1da177e4 LT |
3859 | } |
3860 | ||
3861 | if (bond->params.arp_interval) { /* arp interval, in milliseconds. */ | |
1b76b316 | 3862 | cancel_delayed_work(&bond->arp_work); |
1da177e4 LT |
3863 | } |
3864 | ||
3865 | switch (bond->params.mode) { | |
3866 | case BOND_MODE_8023AD: | |
1b76b316 | 3867 | cancel_delayed_work(&bond->ad_work); |
1da177e4 LT |
3868 | break; |
3869 | case BOND_MODE_TLB: | |
3870 | case BOND_MODE_ALB: | |
1b76b316 | 3871 | cancel_delayed_work(&bond->alb_work); |
1da177e4 LT |
3872 | break; |
3873 | default: | |
3874 | break; | |
3875 | } | |
3876 | ||
1da177e4 LT |
3877 | |
3878 | if ((bond->params.mode == BOND_MODE_TLB) || | |
3879 | (bond->params.mode == BOND_MODE_ALB)) { | |
3880 | /* Must be called only after all | |
3881 | * slaves have been released | |
3882 | */ | |
3883 | bond_alb_deinitialize(bond); | |
3884 | } | |
3885 | ||
3886 | return 0; | |
3887 | } | |
3888 | ||
3889 | static struct net_device_stats *bond_get_stats(struct net_device *bond_dev) | |
3890 | { | |
3891 | struct bonding *bond = bond_dev->priv; | |
3892 | struct net_device_stats *stats = &(bond->stats), *sstats; | |
2439f9eb | 3893 | struct net_device_stats local_stats; |
1da177e4 LT |
3894 | struct slave *slave; |
3895 | int i; | |
3896 | ||
2439f9eb | 3897 | memset(&local_stats, 0, sizeof(struct net_device_stats)); |
1da177e4 LT |
3898 | |
3899 | read_lock_bh(&bond->lock); | |
3900 | ||
3901 | bond_for_each_slave(bond, slave, i) { | |
c45d286e | 3902 | sstats = slave->dev->get_stats(slave->dev); |
2439f9eb AG |
3903 | local_stats.rx_packets += sstats->rx_packets; |
3904 | local_stats.rx_bytes += sstats->rx_bytes; | |
3905 | local_stats.rx_errors += sstats->rx_errors; | |
3906 | local_stats.rx_dropped += sstats->rx_dropped; | |
3907 | ||
3908 | local_stats.tx_packets += sstats->tx_packets; | |
3909 | local_stats.tx_bytes += sstats->tx_bytes; | |
3910 | local_stats.tx_errors += sstats->tx_errors; | |
3911 | local_stats.tx_dropped += sstats->tx_dropped; | |
3912 | ||
3913 | local_stats.multicast += sstats->multicast; | |
3914 | local_stats.collisions += sstats->collisions; | |
3915 | ||
3916 | local_stats.rx_length_errors += sstats->rx_length_errors; | |
3917 | local_stats.rx_over_errors += sstats->rx_over_errors; | |
3918 | local_stats.rx_crc_errors += sstats->rx_crc_errors; | |
3919 | local_stats.rx_frame_errors += sstats->rx_frame_errors; | |
3920 | local_stats.rx_fifo_errors += sstats->rx_fifo_errors; | |
3921 | local_stats.rx_missed_errors += sstats->rx_missed_errors; | |
3922 | ||
3923 | local_stats.tx_aborted_errors += sstats->tx_aborted_errors; | |
3924 | local_stats.tx_carrier_errors += sstats->tx_carrier_errors; | |
3925 | local_stats.tx_fifo_errors += sstats->tx_fifo_errors; | |
3926 | local_stats.tx_heartbeat_errors += sstats->tx_heartbeat_errors; | |
3927 | local_stats.tx_window_errors += sstats->tx_window_errors; | |
3928 | } | |
3929 | ||
3930 | memcpy(stats, &local_stats, sizeof(struct net_device_stats)); | |
1da177e4 LT |
3931 | |
3932 | read_unlock_bh(&bond->lock); | |
3933 | ||
3934 | return stats; | |
3935 | } | |
3936 | ||
3937 | static int bond_do_ioctl(struct net_device *bond_dev, struct ifreq *ifr, int cmd) | |
3938 | { | |
3939 | struct net_device *slave_dev = NULL; | |
3940 | struct ifbond k_binfo; | |
3941 | struct ifbond __user *u_binfo = NULL; | |
3942 | struct ifslave k_sinfo; | |
3943 | struct ifslave __user *u_sinfo = NULL; | |
3944 | struct mii_ioctl_data *mii = NULL; | |
1da177e4 LT |
3945 | int res = 0; |
3946 | ||
3947 | dprintk("bond_ioctl: master=%s, cmd=%d\n", | |
3948 | bond_dev->name, cmd); | |
3949 | ||
3950 | switch (cmd) { | |
1da177e4 LT |
3951 | case SIOCGMIIPHY: |
3952 | mii = if_mii(ifr); | |
3953 | if (!mii) { | |
3954 | return -EINVAL; | |
3955 | } | |
3956 | mii->phy_id = 0; | |
3957 | /* Fall Through */ | |
3958 | case SIOCGMIIREG: | |
3959 | /* | |
3960 | * We do this again just in case we were called by SIOCGMIIREG | |
3961 | * instead of SIOCGMIIPHY. | |
3962 | */ | |
3963 | mii = if_mii(ifr); | |
3964 | if (!mii) { | |
3965 | return -EINVAL; | |
3966 | } | |
3967 | ||
3968 | if (mii->reg_num == 1) { | |
3969 | struct bonding *bond = bond_dev->priv; | |
3970 | mii->val_out = 0; | |
6603a6f2 | 3971 | read_lock(&bond->lock); |
1da177e4 | 3972 | read_lock(&bond->curr_slave_lock); |
4e140079 | 3973 | if (netif_carrier_ok(bond->dev)) { |
1da177e4 LT |
3974 | mii->val_out = BMSR_LSTATUS; |
3975 | } | |
3976 | read_unlock(&bond->curr_slave_lock); | |
6603a6f2 | 3977 | read_unlock(&bond->lock); |
1da177e4 LT |
3978 | } |
3979 | ||
3980 | return 0; | |
3981 | case BOND_INFO_QUERY_OLD: | |
3982 | case SIOCBONDINFOQUERY: | |
3983 | u_binfo = (struct ifbond __user *)ifr->ifr_data; | |
3984 | ||
3985 | if (copy_from_user(&k_binfo, u_binfo, sizeof(ifbond))) { | |
3986 | return -EFAULT; | |
3987 | } | |
3988 | ||
3989 | res = bond_info_query(bond_dev, &k_binfo); | |
3990 | if (res == 0) { | |
3991 | if (copy_to_user(u_binfo, &k_binfo, sizeof(ifbond))) { | |
3992 | return -EFAULT; | |
3993 | } | |
3994 | } | |
3995 | ||
3996 | return res; | |
3997 | case BOND_SLAVE_INFO_QUERY_OLD: | |
3998 | case SIOCBONDSLAVEINFOQUERY: | |
3999 | u_sinfo = (struct ifslave __user *)ifr->ifr_data; | |
4000 | ||
4001 | if (copy_from_user(&k_sinfo, u_sinfo, sizeof(ifslave))) { | |
4002 | return -EFAULT; | |
4003 | } | |
4004 | ||
4005 | res = bond_slave_info_query(bond_dev, &k_sinfo); | |
4006 | if (res == 0) { | |
4007 | if (copy_to_user(u_sinfo, &k_sinfo, sizeof(ifslave))) { | |
4008 | return -EFAULT; | |
4009 | } | |
4010 | } | |
4011 | ||
4012 | return res; | |
4013 | default: | |
4014 | /* Go on */ | |
4015 | break; | |
4016 | } | |
4017 | ||
4018 | if (!capable(CAP_NET_ADMIN)) { | |
4019 | return -EPERM; | |
4020 | } | |
4021 | ||
b76cdba9 | 4022 | down_write(&(bonding_rwsem)); |
881d966b | 4023 | slave_dev = dev_get_by_name(&init_net, ifr->ifr_slave); |
1da177e4 LT |
4024 | |
4025 | dprintk("slave_dev=%p: \n", slave_dev); | |
4026 | ||
4027 | if (!slave_dev) { | |
4028 | res = -ENODEV; | |
4029 | } else { | |
4030 | dprintk("slave_dev->name=%s: \n", slave_dev->name); | |
4031 | switch (cmd) { | |
4032 | case BOND_ENSLAVE_OLD: | |
4033 | case SIOCBONDENSLAVE: | |
4034 | res = bond_enslave(bond_dev, slave_dev); | |
4035 | break; | |
4036 | case BOND_RELEASE_OLD: | |
4037 | case SIOCBONDRELEASE: | |
4038 | res = bond_release(bond_dev, slave_dev); | |
4039 | break; | |
4040 | case BOND_SETHWADDR_OLD: | |
4041 | case SIOCBONDSETHWADDR: | |
4042 | res = bond_sethwaddr(bond_dev, slave_dev); | |
4043 | break; | |
4044 | case BOND_CHANGE_ACTIVE_OLD: | |
4045 | case SIOCBONDCHANGEACTIVE: | |
4046 | res = bond_ioctl_change_active(bond_dev, slave_dev); | |
4047 | break; | |
4048 | default: | |
4049 | res = -EOPNOTSUPP; | |
4050 | } | |
4051 | ||
4052 | dev_put(slave_dev); | |
4053 | } | |
4054 | ||
b76cdba9 | 4055 | up_write(&(bonding_rwsem)); |
1da177e4 LT |
4056 | return res; |
4057 | } | |
4058 | ||
4059 | static void bond_set_multicast_list(struct net_device *bond_dev) | |
4060 | { | |
4061 | struct bonding *bond = bond_dev->priv; | |
4062 | struct dev_mc_list *dmi; | |
4063 | ||
1da177e4 LT |
4064 | /* |
4065 | * Do promisc before checking multicast_mode | |
4066 | */ | |
4067 | if ((bond_dev->flags & IFF_PROMISC) && !(bond->flags & IFF_PROMISC)) { | |
4068 | bond_set_promiscuity(bond, 1); | |
4069 | } | |
4070 | ||
4071 | if (!(bond_dev->flags & IFF_PROMISC) && (bond->flags & IFF_PROMISC)) { | |
4072 | bond_set_promiscuity(bond, -1); | |
4073 | } | |
4074 | ||
4075 | /* set allmulti flag to slaves */ | |
4076 | if ((bond_dev->flags & IFF_ALLMULTI) && !(bond->flags & IFF_ALLMULTI)) { | |
4077 | bond_set_allmulti(bond, 1); | |
4078 | } | |
4079 | ||
4080 | if (!(bond_dev->flags & IFF_ALLMULTI) && (bond->flags & IFF_ALLMULTI)) { | |
4081 | bond_set_allmulti(bond, -1); | |
4082 | } | |
4083 | ||
80ee5ad2 JV |
4084 | read_lock(&bond->lock); |
4085 | ||
1da177e4 LT |
4086 | bond->flags = bond_dev->flags; |
4087 | ||
4088 | /* looking for addresses to add to slaves' mc list */ | |
4089 | for (dmi = bond_dev->mc_list; dmi; dmi = dmi->next) { | |
4090 | if (!bond_mc_list_find_dmi(dmi, bond->mc_list)) { | |
4091 | bond_mc_add(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4092 | } | |
4093 | } | |
4094 | ||
4095 | /* looking for addresses to delete from slaves' list */ | |
4096 | for (dmi = bond->mc_list; dmi; dmi = dmi->next) { | |
4097 | if (!bond_mc_list_find_dmi(dmi, bond_dev->mc_list)) { | |
4098 | bond_mc_delete(bond, dmi->dmi_addr, dmi->dmi_addrlen); | |
4099 | } | |
4100 | } | |
4101 | ||
4102 | /* save master's multicast list */ | |
4103 | bond_mc_list_destroy(bond); | |
4104 | bond_mc_list_copy(bond_dev->mc_list, bond, GFP_ATOMIC); | |
4105 | ||
80ee5ad2 | 4106 | read_unlock(&bond->lock); |
1da177e4 LT |
4107 | } |
4108 | ||
4109 | /* | |
4110 | * Change the MTU of all of a master's slaves to match the master | |
4111 | */ | |
4112 | static int bond_change_mtu(struct net_device *bond_dev, int new_mtu) | |
4113 | { | |
4114 | struct bonding *bond = bond_dev->priv; | |
4115 | struct slave *slave, *stop_at; | |
4116 | int res = 0; | |
4117 | int i; | |
4118 | ||
4119 | dprintk("bond=%p, name=%s, new_mtu=%d\n", bond, | |
4120 | (bond_dev ? bond_dev->name : "None"), new_mtu); | |
4121 | ||
4122 | /* Can't hold bond->lock with bh disabled here since | |
4123 | * some base drivers panic. On the other hand we can't | |
4124 | * hold bond->lock without bh disabled because we'll | |
4125 | * deadlock. The only solution is to rely on the fact | |
4126 | * that we're under rtnl_lock here, and the slaves | |
4127 | * list won't change. This doesn't solve the problem | |
4128 | * of setting the slave's MTU while it is | |
4129 | * transmitting, but the assumption is that the base | |
4130 | * driver can handle that. | |
4131 | * | |
4132 | * TODO: figure out a way to safely iterate the slaves | |
4133 | * list, but without holding a lock around the actual | |
4134 | * call to the base driver. | |
4135 | */ | |
4136 | ||
4137 | bond_for_each_slave(bond, slave, i) { | |
4138 | dprintk("s %p s->p %p c_m %p\n", slave, | |
4139 | slave->prev, slave->dev->change_mtu); | |
e944ef79 | 4140 | |
1da177e4 LT |
4141 | res = dev_set_mtu(slave->dev, new_mtu); |
4142 | ||
4143 | if (res) { | |
4144 | /* If we failed to set the slave's mtu to the new value | |
4145 | * we must abort the operation even in ACTIVE_BACKUP | |
4146 | * mode, because if we allow the backup slaves to have | |
4147 | * different mtu values than the active slave we'll | |
4148 | * need to change their mtu when doing a failover. That | |
4149 | * means changing their mtu from timer context, which | |
4150 | * is probably not a good idea. | |
4151 | */ | |
4152 | dprintk("err %d %s\n", res, slave->dev->name); | |
4153 | goto unwind; | |
4154 | } | |
4155 | } | |
4156 | ||
4157 | bond_dev->mtu = new_mtu; | |
4158 | ||
4159 | return 0; | |
4160 | ||
4161 | unwind: | |
4162 | /* unwind from head to the slave that failed */ | |
4163 | stop_at = slave; | |
4164 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4165 | int tmp_res; | |
4166 | ||
4167 | tmp_res = dev_set_mtu(slave->dev, bond_dev->mtu); | |
4168 | if (tmp_res) { | |
4169 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4170 | slave->dev->name); | |
4171 | } | |
4172 | } | |
4173 | ||
4174 | return res; | |
4175 | } | |
4176 | ||
4177 | /* | |
4178 | * Change HW address | |
4179 | * | |
4180 | * Note that many devices must be down to change the HW address, and | |
4181 | * downing the master releases all slaves. We can make bonds full of | |
4182 | * bonding devices to test this, however. | |
4183 | */ | |
4184 | static int bond_set_mac_address(struct net_device *bond_dev, void *addr) | |
4185 | { | |
4186 | struct bonding *bond = bond_dev->priv; | |
4187 | struct sockaddr *sa = addr, tmp_sa; | |
4188 | struct slave *slave, *stop_at; | |
4189 | int res = 0; | |
4190 | int i; | |
4191 | ||
4192 | dprintk("bond=%p, name=%s\n", bond, (bond_dev ? bond_dev->name : "None")); | |
4193 | ||
dd957c57 | 4194 | /* |
3915c1e8 JV |
4195 | * If fail_over_mac is set to active, do nothing and return |
4196 | * success. Returning an error causes ifenslave to fail. | |
dd957c57 | 4197 | */ |
3915c1e8 | 4198 | if (bond->params.fail_over_mac == BOND_FOM_ACTIVE) |
dd957c57 | 4199 | return 0; |
2ab82852 | 4200 | |
1da177e4 LT |
4201 | if (!is_valid_ether_addr(sa->sa_data)) { |
4202 | return -EADDRNOTAVAIL; | |
4203 | } | |
4204 | ||
4205 | /* Can't hold bond->lock with bh disabled here since | |
4206 | * some base drivers panic. On the other hand we can't | |
4207 | * hold bond->lock without bh disabled because we'll | |
4208 | * deadlock. The only solution is to rely on the fact | |
4209 | * that we're under rtnl_lock here, and the slaves | |
4210 | * list won't change. This doesn't solve the problem | |
4211 | * of setting the slave's hw address while it is | |
4212 | * transmitting, but the assumption is that the base | |
4213 | * driver can handle that. | |
4214 | * | |
4215 | * TODO: figure out a way to safely iterate the slaves | |
4216 | * list, but without holding a lock around the actual | |
4217 | * call to the base driver. | |
4218 | */ | |
4219 | ||
4220 | bond_for_each_slave(bond, slave, i) { | |
4221 | dprintk("slave %p %s\n", slave, slave->dev->name); | |
4222 | ||
4223 | if (slave->dev->set_mac_address == NULL) { | |
4224 | res = -EOPNOTSUPP; | |
4225 | dprintk("EOPNOTSUPP %s\n", slave->dev->name); | |
4226 | goto unwind; | |
4227 | } | |
4228 | ||
4229 | res = dev_set_mac_address(slave->dev, addr); | |
4230 | if (res) { | |
4231 | /* TODO: consider downing the slave | |
4232 | * and retry ? | |
4233 | * User should expect communications | |
4234 | * breakage anyway until ARP finish | |
4235 | * updating, so... | |
4236 | */ | |
4237 | dprintk("err %d %s\n", res, slave->dev->name); | |
4238 | goto unwind; | |
4239 | } | |
4240 | } | |
4241 | ||
4242 | /* success */ | |
4243 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
4244 | return 0; | |
4245 | ||
4246 | unwind: | |
4247 | memcpy(tmp_sa.sa_data, bond_dev->dev_addr, bond_dev->addr_len); | |
4248 | tmp_sa.sa_family = bond_dev->type; | |
4249 | ||
4250 | /* unwind from head to the slave that failed */ | |
4251 | stop_at = slave; | |
4252 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
4253 | int tmp_res; | |
4254 | ||
4255 | tmp_res = dev_set_mac_address(slave->dev, &tmp_sa); | |
4256 | if (tmp_res) { | |
4257 | dprintk("unwind err %d dev %s\n", tmp_res, | |
4258 | slave->dev->name); | |
4259 | } | |
4260 | } | |
4261 | ||
4262 | return res; | |
4263 | } | |
4264 | ||
4265 | static int bond_xmit_roundrobin(struct sk_buff *skb, struct net_device *bond_dev) | |
4266 | { | |
4267 | struct bonding *bond = bond_dev->priv; | |
4268 | struct slave *slave, *start_at; | |
cf5f9044 | 4269 | int i, slave_no, res = 1; |
1da177e4 LT |
4270 | |
4271 | read_lock(&bond->lock); | |
4272 | ||
4273 | if (!BOND_IS_OK(bond)) { | |
4274 | goto out; | |
4275 | } | |
4276 | ||
cf5f9044 JV |
4277 | /* |
4278 | * Concurrent TX may collide on rr_tx_counter; we accept that | |
4279 | * as being rare enough not to justify using an atomic op here | |
4280 | */ | |
4281 | slave_no = bond->rr_tx_counter++ % bond->slave_cnt; | |
1da177e4 | 4282 | |
cf5f9044 JV |
4283 | bond_for_each_slave(bond, slave, i) { |
4284 | slave_no--; | |
4285 | if (slave_no < 0) { | |
4286 | break; | |
4287 | } | |
1da177e4 LT |
4288 | } |
4289 | ||
cf5f9044 | 4290 | start_at = slave; |
1da177e4 LT |
4291 | bond_for_each_slave_from(bond, slave, i, start_at) { |
4292 | if (IS_UP(slave->dev) && | |
4293 | (slave->link == BOND_LINK_UP) && | |
4294 | (slave->state == BOND_STATE_ACTIVE)) { | |
4295 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
1da177e4 LT |
4296 | break; |
4297 | } | |
4298 | } | |
4299 | ||
1da177e4 LT |
4300 | out: |
4301 | if (res) { | |
4302 | /* no suitable interface, frame not sent */ | |
4303 | dev_kfree_skb(skb); | |
4304 | } | |
4305 | read_unlock(&bond->lock); | |
4306 | return 0; | |
4307 | } | |
4308 | ||
075897ce | 4309 | |
1da177e4 LT |
4310 | /* |
4311 | * in active-backup mode, we know that bond->curr_active_slave is always valid if | |
4312 | * the bond has a usable interface. | |
4313 | */ | |
4314 | static int bond_xmit_activebackup(struct sk_buff *skb, struct net_device *bond_dev) | |
4315 | { | |
4316 | struct bonding *bond = bond_dev->priv; | |
4317 | int res = 1; | |
4318 | ||
1da177e4 LT |
4319 | read_lock(&bond->lock); |
4320 | read_lock(&bond->curr_slave_lock); | |
4321 | ||
4322 | if (!BOND_IS_OK(bond)) { | |
4323 | goto out; | |
4324 | } | |
4325 | ||
075897ce JL |
4326 | if (!bond->curr_active_slave) |
4327 | goto out; | |
4328 | ||
075897ce JL |
4329 | res = bond_dev_queue_xmit(bond, skb, bond->curr_active_slave->dev); |
4330 | ||
1da177e4 LT |
4331 | out: |
4332 | if (res) { | |
4333 | /* no suitable interface, frame not sent */ | |
4334 | dev_kfree_skb(skb); | |
4335 | } | |
4336 | read_unlock(&bond->curr_slave_lock); | |
4337 | read_unlock(&bond->lock); | |
4338 | return 0; | |
4339 | } | |
4340 | ||
4341 | /* | |
169a3e66 JV |
4342 | * In bond_xmit_xor() , we determine the output device by using a pre- |
4343 | * determined xmit_hash_policy(), If the selected device is not enabled, | |
4344 | * find the next active slave. | |
1da177e4 LT |
4345 | */ |
4346 | static int bond_xmit_xor(struct sk_buff *skb, struct net_device *bond_dev) | |
4347 | { | |
4348 | struct bonding *bond = bond_dev->priv; | |
1da177e4 LT |
4349 | struct slave *slave, *start_at; |
4350 | int slave_no; | |
4351 | int i; | |
4352 | int res = 1; | |
4353 | ||
4354 | read_lock(&bond->lock); | |
4355 | ||
4356 | if (!BOND_IS_OK(bond)) { | |
4357 | goto out; | |
4358 | } | |
4359 | ||
169a3e66 | 4360 | slave_no = bond->xmit_hash_policy(skb, bond_dev, bond->slave_cnt); |
1da177e4 LT |
4361 | |
4362 | bond_for_each_slave(bond, slave, i) { | |
4363 | slave_no--; | |
4364 | if (slave_no < 0) { | |
4365 | break; | |
4366 | } | |
4367 | } | |
4368 | ||
4369 | start_at = slave; | |
4370 | ||
4371 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4372 | if (IS_UP(slave->dev) && | |
4373 | (slave->link == BOND_LINK_UP) && | |
4374 | (slave->state == BOND_STATE_ACTIVE)) { | |
4375 | res = bond_dev_queue_xmit(bond, skb, slave->dev); | |
4376 | break; | |
4377 | } | |
4378 | } | |
4379 | ||
4380 | out: | |
4381 | if (res) { | |
4382 | /* no suitable interface, frame not sent */ | |
4383 | dev_kfree_skb(skb); | |
4384 | } | |
4385 | read_unlock(&bond->lock); | |
4386 | return 0; | |
4387 | } | |
4388 | ||
4389 | /* | |
4390 | * in broadcast mode, we send everything to all usable interfaces. | |
4391 | */ | |
4392 | static int bond_xmit_broadcast(struct sk_buff *skb, struct net_device *bond_dev) | |
4393 | { | |
4394 | struct bonding *bond = bond_dev->priv; | |
4395 | struct slave *slave, *start_at; | |
4396 | struct net_device *tx_dev = NULL; | |
4397 | int i; | |
4398 | int res = 1; | |
4399 | ||
4400 | read_lock(&bond->lock); | |
4401 | ||
4402 | if (!BOND_IS_OK(bond)) { | |
4403 | goto out; | |
4404 | } | |
4405 | ||
4406 | read_lock(&bond->curr_slave_lock); | |
4407 | start_at = bond->curr_active_slave; | |
4408 | read_unlock(&bond->curr_slave_lock); | |
4409 | ||
4410 | if (!start_at) { | |
4411 | goto out; | |
4412 | } | |
4413 | ||
4414 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
4415 | if (IS_UP(slave->dev) && | |
4416 | (slave->link == BOND_LINK_UP) && | |
4417 | (slave->state == BOND_STATE_ACTIVE)) { | |
4418 | if (tx_dev) { | |
4419 | struct sk_buff *skb2 = skb_clone(skb, GFP_ATOMIC); | |
4420 | if (!skb2) { | |
4421 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4422 | ": %s: Error: bond_xmit_broadcast(): " |
4423 | "skb_clone() failed\n", | |
4424 | bond_dev->name); | |
1da177e4 LT |
4425 | continue; |
4426 | } | |
4427 | ||
4428 | res = bond_dev_queue_xmit(bond, skb2, tx_dev); | |
4429 | if (res) { | |
4430 | dev_kfree_skb(skb2); | |
4431 | continue; | |
4432 | } | |
4433 | } | |
4434 | tx_dev = slave->dev; | |
4435 | } | |
4436 | } | |
4437 | ||
4438 | if (tx_dev) { | |
4439 | res = bond_dev_queue_xmit(bond, skb, tx_dev); | |
4440 | } | |
4441 | ||
4442 | out: | |
4443 | if (res) { | |
4444 | /* no suitable interface, frame not sent */ | |
4445 | dev_kfree_skb(skb); | |
4446 | } | |
4447 | /* frame sent to all suitable interfaces */ | |
4448 | read_unlock(&bond->lock); | |
4449 | return 0; | |
4450 | } | |
4451 | ||
4452 | /*------------------------- Device initialization ---------------------------*/ | |
4453 | ||
6f6652be JV |
4454 | static void bond_set_xmit_hash_policy(struct bonding *bond) |
4455 | { | |
4456 | switch (bond->params.xmit_policy) { | |
4457 | case BOND_XMIT_POLICY_LAYER23: | |
4458 | bond->xmit_hash_policy = bond_xmit_hash_policy_l23; | |
4459 | break; | |
4460 | case BOND_XMIT_POLICY_LAYER34: | |
4461 | bond->xmit_hash_policy = bond_xmit_hash_policy_l34; | |
4462 | break; | |
4463 | case BOND_XMIT_POLICY_LAYER2: | |
4464 | default: | |
4465 | bond->xmit_hash_policy = bond_xmit_hash_policy_l2; | |
4466 | break; | |
4467 | } | |
4468 | } | |
4469 | ||
1da177e4 LT |
4470 | /* |
4471 | * set bond mode specific net device operations | |
4472 | */ | |
a77b5325 | 4473 | void bond_set_mode_ops(struct bonding *bond, int mode) |
1da177e4 | 4474 | { |
169a3e66 JV |
4475 | struct net_device *bond_dev = bond->dev; |
4476 | ||
1da177e4 LT |
4477 | switch (mode) { |
4478 | case BOND_MODE_ROUNDROBIN: | |
4479 | bond_dev->hard_start_xmit = bond_xmit_roundrobin; | |
4480 | break; | |
4481 | case BOND_MODE_ACTIVEBACKUP: | |
4482 | bond_dev->hard_start_xmit = bond_xmit_activebackup; | |
4483 | break; | |
4484 | case BOND_MODE_XOR: | |
4485 | bond_dev->hard_start_xmit = bond_xmit_xor; | |
6f6652be | 4486 | bond_set_xmit_hash_policy(bond); |
1da177e4 LT |
4487 | break; |
4488 | case BOND_MODE_BROADCAST: | |
4489 | bond_dev->hard_start_xmit = bond_xmit_broadcast; | |
4490 | break; | |
4491 | case BOND_MODE_8023AD: | |
8f903c70 | 4492 | bond_set_master_3ad_flags(bond); |
1da177e4 | 4493 | bond_dev->hard_start_xmit = bond_3ad_xmit_xor; |
6f6652be | 4494 | bond_set_xmit_hash_policy(bond); |
1da177e4 | 4495 | break; |
1da177e4 | 4496 | case BOND_MODE_ALB: |
8f903c70 JV |
4497 | bond_set_master_alb_flags(bond); |
4498 | /* FALLTHRU */ | |
4499 | case BOND_MODE_TLB: | |
1da177e4 LT |
4500 | bond_dev->hard_start_xmit = bond_alb_xmit; |
4501 | bond_dev->set_mac_address = bond_alb_set_mac_address; | |
4502 | break; | |
4503 | default: | |
4504 | /* Should never happen, mode already checked */ | |
4505 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
4506 | ": %s: Error: Unknown bonding mode %d\n", |
4507 | bond_dev->name, | |
1da177e4 LT |
4508 | mode); |
4509 | break; | |
4510 | } | |
4511 | } | |
4512 | ||
217df670 JV |
4513 | static void bond_ethtool_get_drvinfo(struct net_device *bond_dev, |
4514 | struct ethtool_drvinfo *drvinfo) | |
4515 | { | |
4516 | strncpy(drvinfo->driver, DRV_NAME, 32); | |
4517 | strncpy(drvinfo->version, DRV_VERSION, 32); | |
4518 | snprintf(drvinfo->fw_version, 32, "%d", BOND_ABI_VERSION); | |
4519 | } | |
4520 | ||
7282d491 | 4521 | static const struct ethtool_ops bond_ethtool_ops = { |
217df670 | 4522 | .get_drvinfo = bond_ethtool_get_drvinfo, |
8531c5ff AK |
4523 | }; |
4524 | ||
1da177e4 LT |
4525 | /* |
4526 | * Does not allocate but creates a /proc entry. | |
4527 | * Allowed to fail. | |
4528 | */ | |
3c535952 | 4529 | static int bond_init(struct net_device *bond_dev, struct bond_params *params) |
1da177e4 LT |
4530 | { |
4531 | struct bonding *bond = bond_dev->priv; | |
4532 | ||
4533 | dprintk("Begin bond_init for %s\n", bond_dev->name); | |
4534 | ||
4535 | /* initialize rwlocks */ | |
4536 | rwlock_init(&bond->lock); | |
4537 | rwlock_init(&bond->curr_slave_lock); | |
4538 | ||
4539 | bond->params = *params; /* copy params struct */ | |
4540 | ||
1b76b316 JV |
4541 | bond->wq = create_singlethread_workqueue(bond_dev->name); |
4542 | if (!bond->wq) | |
4543 | return -ENOMEM; | |
4544 | ||
1da177e4 LT |
4545 | /* Initialize pointers */ |
4546 | bond->first_slave = NULL; | |
4547 | bond->curr_active_slave = NULL; | |
4548 | bond->current_arp_slave = NULL; | |
4549 | bond->primary_slave = NULL; | |
4550 | bond->dev = bond_dev; | |
1053f62c | 4551 | bond->send_grat_arp = 0; |
d90a162a | 4552 | bond->setup_by_slave = 0; |
1da177e4 LT |
4553 | INIT_LIST_HEAD(&bond->vlan_list); |
4554 | ||
4555 | /* Initialize the device entry points */ | |
4556 | bond_dev->open = bond_open; | |
4557 | bond_dev->stop = bond_close; | |
4558 | bond_dev->get_stats = bond_get_stats; | |
4559 | bond_dev->do_ioctl = bond_do_ioctl; | |
8531c5ff | 4560 | bond_dev->ethtool_ops = &bond_ethtool_ops; |
1da177e4 LT |
4561 | bond_dev->set_multicast_list = bond_set_multicast_list; |
4562 | bond_dev->change_mtu = bond_change_mtu; | |
4563 | bond_dev->set_mac_address = bond_set_mac_address; | |
3a1521b7 | 4564 | bond_dev->validate_addr = NULL; |
1da177e4 | 4565 | |
169a3e66 | 4566 | bond_set_mode_ops(bond, bond->params.mode); |
1da177e4 LT |
4567 | |
4568 | bond_dev->destructor = free_netdev; | |
4569 | ||
4570 | /* Initialize the device options */ | |
4571 | bond_dev->tx_queue_len = 0; | |
4572 | bond_dev->flags |= IFF_MASTER|IFF_MULTICAST; | |
0b680e75 | 4573 | bond_dev->priv_flags |= IFF_BONDING; |
1da177e4 LT |
4574 | |
4575 | /* At first, we block adding VLANs. That's the only way to | |
4576 | * prevent problems that occur when adding VLANs over an | |
4577 | * empty bond. The block will be removed once non-challenged | |
4578 | * slaves are enslaved. | |
4579 | */ | |
4580 | bond_dev->features |= NETIF_F_VLAN_CHALLENGED; | |
4581 | ||
932ff279 | 4582 | /* don't acquire bond device's netif_tx_lock when |
1da177e4 LT |
4583 | * transmitting */ |
4584 | bond_dev->features |= NETIF_F_LLTX; | |
4585 | ||
4586 | /* By default, we declare the bond to be fully | |
4587 | * VLAN hardware accelerated capable. Special | |
4588 | * care is taken in the various xmit functions | |
4589 | * when there are slaves that are not hw accel | |
4590 | * capable | |
4591 | */ | |
4592 | bond_dev->vlan_rx_register = bond_vlan_rx_register; | |
4593 | bond_dev->vlan_rx_add_vid = bond_vlan_rx_add_vid; | |
4594 | bond_dev->vlan_rx_kill_vid = bond_vlan_rx_kill_vid; | |
4595 | bond_dev->features |= (NETIF_F_HW_VLAN_TX | | |
4596 | NETIF_F_HW_VLAN_RX | | |
4597 | NETIF_F_HW_VLAN_FILTER); | |
4598 | ||
4599 | #ifdef CONFIG_PROC_FS | |
4600 | bond_create_proc_entry(bond); | |
4601 | #endif | |
1da177e4 LT |
4602 | list_add_tail(&bond->bond_list, &bond_dev_list); |
4603 | ||
4604 | return 0; | |
4605 | } | |
4606 | ||
4607 | /* De-initialize device specific data. | |
4608 | * Caller must hold rtnl_lock. | |
4609 | */ | |
c50b85d0 | 4610 | static void bond_deinit(struct net_device *bond_dev) |
1da177e4 LT |
4611 | { |
4612 | struct bonding *bond = bond_dev->priv; | |
4613 | ||
4614 | list_del(&bond->bond_list); | |
4615 | ||
4616 | #ifdef CONFIG_PROC_FS | |
4617 | bond_remove_proc_entry(bond); | |
4618 | #endif | |
4619 | } | |
4620 | ||
fdaea7a9 JV |
4621 | static void bond_work_cancel_all(struct bonding *bond) |
4622 | { | |
4623 | write_lock_bh(&bond->lock); | |
4624 | bond->kill_timers = 1; | |
4625 | write_unlock_bh(&bond->lock); | |
4626 | ||
4627 | if (bond->params.miimon && delayed_work_pending(&bond->mii_work)) | |
4628 | cancel_delayed_work(&bond->mii_work); | |
4629 | ||
4630 | if (bond->params.arp_interval && delayed_work_pending(&bond->arp_work)) | |
4631 | cancel_delayed_work(&bond->arp_work); | |
4632 | ||
4633 | if (bond->params.mode == BOND_MODE_ALB && | |
4634 | delayed_work_pending(&bond->alb_work)) | |
4635 | cancel_delayed_work(&bond->alb_work); | |
4636 | ||
4637 | if (bond->params.mode == BOND_MODE_8023AD && | |
4638 | delayed_work_pending(&bond->ad_work)) | |
4639 | cancel_delayed_work(&bond->ad_work); | |
4640 | } | |
4641 | ||
1da177e4 LT |
4642 | /* Unregister and free all bond devices. |
4643 | * Caller must hold rtnl_lock. | |
4644 | */ | |
4645 | static void bond_free_all(void) | |
4646 | { | |
4647 | struct bonding *bond, *nxt; | |
4648 | ||
4649 | list_for_each_entry_safe(bond, nxt, &bond_dev_list, bond_list) { | |
4650 | struct net_device *bond_dev = bond->dev; | |
4651 | ||
fdaea7a9 | 4652 | bond_work_cancel_all(bond); |
80ee5ad2 | 4653 | netif_tx_lock_bh(bond_dev); |
70298705 | 4654 | bond_mc_list_destroy(bond); |
80ee5ad2 | 4655 | netif_tx_unlock_bh(bond_dev); |
70298705 | 4656 | /* Release the bonded slaves */ |
4657 | bond_release_all(bond_dev); | |
92b41daa | 4658 | bond_destroy(bond); |
1da177e4 LT |
4659 | } |
4660 | ||
4661 | #ifdef CONFIG_PROC_FS | |
4662 | bond_destroy_proc_dir(); | |
4663 | #endif | |
4664 | } | |
4665 | ||
4666 | /*------------------------- Module initialization ---------------------------*/ | |
4667 | ||
4668 | /* | |
4669 | * Convert string input module parms. Accept either the | |
ece95f7f JV |
4670 | * number of the mode or its string name. A bit complicated because |
4671 | * some mode names are substrings of other names, and calls from sysfs | |
4672 | * may have whitespace in the name (trailing newlines, for example). | |
1da177e4 | 4673 | */ |
ece95f7f | 4674 | int bond_parse_parm(const char *buf, struct bond_parm_tbl *tbl) |
1da177e4 | 4675 | { |
ece95f7f | 4676 | int mode = -1, i, rv; |
a42e534f | 4677 | char *p, modestr[BOND_MAX_MODENAME_LEN + 1] = { 0, }; |
ece95f7f | 4678 | |
a42e534f JV |
4679 | for (p = (char *)buf; *p; p++) |
4680 | if (!(isdigit(*p) || isspace(*p))) | |
4681 | break; | |
4682 | ||
4683 | if (*p) | |
ece95f7f | 4684 | rv = sscanf(buf, "%20s", modestr); |
a42e534f JV |
4685 | else |
4686 | rv = sscanf(buf, "%d", &mode); | |
4687 | ||
4688 | if (!rv) | |
4689 | return -1; | |
1da177e4 LT |
4690 | |
4691 | for (i = 0; tbl[i].modename; i++) { | |
ece95f7f JV |
4692 | if (mode == tbl[i].mode) |
4693 | return tbl[i].mode; | |
4694 | if (strcmp(modestr, tbl[i].modename) == 0) | |
1da177e4 | 4695 | return tbl[i].mode; |
1da177e4 LT |
4696 | } |
4697 | ||
4698 | return -1; | |
4699 | } | |
4700 | ||
4701 | static int bond_check_params(struct bond_params *params) | |
4702 | { | |
3915c1e8 | 4703 | int arp_validate_value, fail_over_mac_value; |
f5b2b966 | 4704 | |
1da177e4 LT |
4705 | /* |
4706 | * Convert string parameters. | |
4707 | */ | |
4708 | if (mode) { | |
4709 | bond_mode = bond_parse_parm(mode, bond_mode_tbl); | |
4710 | if (bond_mode == -1) { | |
4711 | printk(KERN_ERR DRV_NAME | |
4712 | ": Error: Invalid bonding mode \"%s\"\n", | |
4713 | mode == NULL ? "NULL" : mode); | |
4714 | return -EINVAL; | |
4715 | } | |
4716 | } | |
4717 | ||
169a3e66 JV |
4718 | if (xmit_hash_policy) { |
4719 | if ((bond_mode != BOND_MODE_XOR) && | |
4720 | (bond_mode != BOND_MODE_8023AD)) { | |
4721 | printk(KERN_INFO DRV_NAME | |
4722 | ": xor_mode param is irrelevant in mode %s\n", | |
4723 | bond_mode_name(bond_mode)); | |
4724 | } else { | |
4725 | xmit_hashtype = bond_parse_parm(xmit_hash_policy, | |
4726 | xmit_hashtype_tbl); | |
4727 | if (xmit_hashtype == -1) { | |
4728 | printk(KERN_ERR DRV_NAME | |
4729 | ": Error: Invalid xmit_hash_policy \"%s\"\n", | |
4730 | xmit_hash_policy == NULL ? "NULL" : | |
4731 | xmit_hash_policy); | |
4732 | return -EINVAL; | |
4733 | } | |
4734 | } | |
4735 | } | |
4736 | ||
1da177e4 LT |
4737 | if (lacp_rate) { |
4738 | if (bond_mode != BOND_MODE_8023AD) { | |
4739 | printk(KERN_INFO DRV_NAME | |
4740 | ": lacp_rate param is irrelevant in mode %s\n", | |
4741 | bond_mode_name(bond_mode)); | |
4742 | } else { | |
4743 | lacp_fast = bond_parse_parm(lacp_rate, bond_lacp_tbl); | |
4744 | if (lacp_fast == -1) { | |
4745 | printk(KERN_ERR DRV_NAME | |
4746 | ": Error: Invalid lacp rate \"%s\"\n", | |
4747 | lacp_rate == NULL ? "NULL" : lacp_rate); | |
4748 | return -EINVAL; | |
4749 | } | |
4750 | } | |
4751 | } | |
4752 | ||
4753 | if (max_bonds < 1 || max_bonds > INT_MAX) { | |
4754 | printk(KERN_WARNING DRV_NAME | |
4755 | ": Warning: max_bonds (%d) not in range %d-%d, so it " | |
4e0952c7 | 4756 | "was reset to BOND_DEFAULT_MAX_BONDS (%d)\n", |
1da177e4 LT |
4757 | max_bonds, 1, INT_MAX, BOND_DEFAULT_MAX_BONDS); |
4758 | max_bonds = BOND_DEFAULT_MAX_BONDS; | |
4759 | } | |
4760 | ||
4761 | if (miimon < 0) { | |
4762 | printk(KERN_WARNING DRV_NAME | |
4763 | ": Warning: miimon module parameter (%d), " | |
4764 | "not in range 0-%d, so it was reset to %d\n", | |
4765 | miimon, INT_MAX, BOND_LINK_MON_INTERV); | |
4766 | miimon = BOND_LINK_MON_INTERV; | |
4767 | } | |
4768 | ||
4769 | if (updelay < 0) { | |
4770 | printk(KERN_WARNING DRV_NAME | |
4771 | ": Warning: updelay module parameter (%d), " | |
4772 | "not in range 0-%d, so it was reset to 0\n", | |
4773 | updelay, INT_MAX); | |
4774 | updelay = 0; | |
4775 | } | |
4776 | ||
4777 | if (downdelay < 0) { | |
4778 | printk(KERN_WARNING DRV_NAME | |
4779 | ": Warning: downdelay module parameter (%d), " | |
4780 | "not in range 0-%d, so it was reset to 0\n", | |
4781 | downdelay, INT_MAX); | |
4782 | downdelay = 0; | |
4783 | } | |
4784 | ||
4785 | if ((use_carrier != 0) && (use_carrier != 1)) { | |
4786 | printk(KERN_WARNING DRV_NAME | |
4787 | ": Warning: use_carrier module parameter (%d), " | |
4788 | "not of valid value (0/1), so it was set to 1\n", | |
4789 | use_carrier); | |
4790 | use_carrier = 1; | |
4791 | } | |
4792 | ||
7893b249 MS |
4793 | if (num_grat_arp < 0 || num_grat_arp > 255) { |
4794 | printk(KERN_WARNING DRV_NAME | |
4795 | ": Warning: num_grat_arp (%d) not in range 0-255 so it " | |
4796 | "was reset to 1 \n", num_grat_arp); | |
4797 | num_grat_arp = 1; | |
4798 | } | |
4799 | ||
1da177e4 LT |
4800 | /* reset values for 802.3ad */ |
4801 | if (bond_mode == BOND_MODE_8023AD) { | |
4802 | if (!miimon) { | |
4803 | printk(KERN_WARNING DRV_NAME | |
4804 | ": Warning: miimon must be specified, " | |
4805 | "otherwise bonding will not detect link " | |
4806 | "failure, speed and duplex which are " | |
4807 | "essential for 802.3ad operation\n"); | |
4808 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4809 | miimon = 100; | |
4810 | } | |
4811 | } | |
4812 | ||
4813 | /* reset values for TLB/ALB */ | |
4814 | if ((bond_mode == BOND_MODE_TLB) || | |
4815 | (bond_mode == BOND_MODE_ALB)) { | |
4816 | if (!miimon) { | |
4817 | printk(KERN_WARNING DRV_NAME | |
4818 | ": Warning: miimon must be specified, " | |
4819 | "otherwise bonding will not detect link " | |
4820 | "failure and link speed which are essential " | |
4821 | "for TLB/ALB load balancing\n"); | |
4822 | printk(KERN_WARNING "Forcing miimon to 100msec\n"); | |
4823 | miimon = 100; | |
4824 | } | |
4825 | } | |
4826 | ||
4827 | if (bond_mode == BOND_MODE_ALB) { | |
4828 | printk(KERN_NOTICE DRV_NAME | |
4829 | ": In ALB mode you might experience client " | |
4830 | "disconnections upon reconnection of a link if the " | |
4831 | "bonding module updelay parameter (%d msec) is " | |
4832 | "incompatible with the forwarding delay time of the " | |
4833 | "switch\n", | |
4834 | updelay); | |
4835 | } | |
4836 | ||
4837 | if (!miimon) { | |
4838 | if (updelay || downdelay) { | |
4839 | /* just warn the user the up/down delay will have | |
4840 | * no effect since miimon is zero... | |
4841 | */ | |
4842 | printk(KERN_WARNING DRV_NAME | |
4843 | ": Warning: miimon module parameter not set " | |
4844 | "and updelay (%d) or downdelay (%d) module " | |
4845 | "parameter is set; updelay and downdelay have " | |
4846 | "no effect unless miimon is set\n", | |
4847 | updelay, downdelay); | |
4848 | } | |
4849 | } else { | |
4850 | /* don't allow arp monitoring */ | |
4851 | if (arp_interval) { | |
4852 | printk(KERN_WARNING DRV_NAME | |
4853 | ": Warning: miimon (%d) and arp_interval (%d) " | |
4854 | "can't be used simultaneously, disabling ARP " | |
4855 | "monitoring\n", | |
4856 | miimon, arp_interval); | |
4857 | arp_interval = 0; | |
4858 | } | |
4859 | ||
4860 | if ((updelay % miimon) != 0) { | |
4861 | printk(KERN_WARNING DRV_NAME | |
4862 | ": Warning: updelay (%d) is not a multiple " | |
4863 | "of miimon (%d), updelay rounded to %d ms\n", | |
4864 | updelay, miimon, (updelay / miimon) * miimon); | |
4865 | } | |
4866 | ||
4867 | updelay /= miimon; | |
4868 | ||
4869 | if ((downdelay % miimon) != 0) { | |
4870 | printk(KERN_WARNING DRV_NAME | |
4871 | ": Warning: downdelay (%d) is not a multiple " | |
4872 | "of miimon (%d), downdelay rounded to %d ms\n", | |
4873 | downdelay, miimon, | |
4874 | (downdelay / miimon) * miimon); | |
4875 | } | |
4876 | ||
4877 | downdelay /= miimon; | |
4878 | } | |
4879 | ||
4880 | if (arp_interval < 0) { | |
4881 | printk(KERN_WARNING DRV_NAME | |
4882 | ": Warning: arp_interval module parameter (%d) " | |
4883 | ", not in range 0-%d, so it was reset to %d\n", | |
4884 | arp_interval, INT_MAX, BOND_LINK_ARP_INTERV); | |
4885 | arp_interval = BOND_LINK_ARP_INTERV; | |
4886 | } | |
4887 | ||
4888 | for (arp_ip_count = 0; | |
4889 | (arp_ip_count < BOND_MAX_ARP_TARGETS) && arp_ip_target[arp_ip_count]; | |
4890 | arp_ip_count++) { | |
4891 | /* not complete check, but should be good enough to | |
4892 | catch mistakes */ | |
4893 | if (!isdigit(arp_ip_target[arp_ip_count][0])) { | |
4894 | printk(KERN_WARNING DRV_NAME | |
4895 | ": Warning: bad arp_ip_target module parameter " | |
4896 | "(%s), ARP monitoring will not be performed\n", | |
4897 | arp_ip_target[arp_ip_count]); | |
4898 | arp_interval = 0; | |
4899 | } else { | |
d3bb52b0 | 4900 | __be32 ip = in_aton(arp_ip_target[arp_ip_count]); |
1da177e4 LT |
4901 | arp_target[arp_ip_count] = ip; |
4902 | } | |
4903 | } | |
4904 | ||
4905 | if (arp_interval && !arp_ip_count) { | |
4906 | /* don't allow arping if no arp_ip_target given... */ | |
4907 | printk(KERN_WARNING DRV_NAME | |
4908 | ": Warning: arp_interval module parameter (%d) " | |
4909 | "specified without providing an arp_ip_target " | |
4910 | "parameter, arp_interval was reset to 0\n", | |
4911 | arp_interval); | |
4912 | arp_interval = 0; | |
4913 | } | |
4914 | ||
f5b2b966 JV |
4915 | if (arp_validate) { |
4916 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) { | |
4917 | printk(KERN_ERR DRV_NAME | |
4918 | ": arp_validate only supported in active-backup mode\n"); | |
4919 | return -EINVAL; | |
4920 | } | |
4921 | if (!arp_interval) { | |
4922 | printk(KERN_ERR DRV_NAME | |
4923 | ": arp_validate requires arp_interval\n"); | |
4924 | return -EINVAL; | |
4925 | } | |
4926 | ||
4927 | arp_validate_value = bond_parse_parm(arp_validate, | |
4928 | arp_validate_tbl); | |
4929 | if (arp_validate_value == -1) { | |
4930 | printk(KERN_ERR DRV_NAME | |
4931 | ": Error: invalid arp_validate \"%s\"\n", | |
4932 | arp_validate == NULL ? "NULL" : arp_validate); | |
4933 | return -EINVAL; | |
4934 | } | |
4935 | } else | |
4936 | arp_validate_value = 0; | |
4937 | ||
1da177e4 LT |
4938 | if (miimon) { |
4939 | printk(KERN_INFO DRV_NAME | |
4940 | ": MII link monitoring set to %d ms\n", | |
4941 | miimon); | |
4942 | } else if (arp_interval) { | |
4943 | int i; | |
4944 | ||
4945 | printk(KERN_INFO DRV_NAME | |
f5b2b966 JV |
4946 | ": ARP monitoring set to %d ms, validate %s, with %d target(s):", |
4947 | arp_interval, | |
4948 | arp_validate_tbl[arp_validate_value].modename, | |
4949 | arp_ip_count); | |
1da177e4 LT |
4950 | |
4951 | for (i = 0; i < arp_ip_count; i++) | |
4952 | printk (" %s", arp_ip_target[i]); | |
4953 | ||
4954 | printk("\n"); | |
4955 | ||
4956 | } else { | |
4957 | /* miimon and arp_interval not set, we need one so things | |
4958 | * work as expected, see bonding.txt for details | |
4959 | */ | |
4960 | printk(KERN_WARNING DRV_NAME | |
4961 | ": Warning: either miimon or arp_interval and " | |
4962 | "arp_ip_target module parameters must be specified, " | |
4963 | "otherwise bonding will not detect link failures! see " | |
4964 | "bonding.txt for details.\n"); | |
4965 | } | |
4966 | ||
4967 | if (primary && !USES_PRIMARY(bond_mode)) { | |
4968 | /* currently, using a primary only makes sense | |
4969 | * in active backup, TLB or ALB modes | |
4970 | */ | |
4971 | printk(KERN_WARNING DRV_NAME | |
4972 | ": Warning: %s primary device specified but has no " | |
4973 | "effect in %s mode\n", | |
4974 | primary, bond_mode_name(bond_mode)); | |
4975 | primary = NULL; | |
4976 | } | |
4977 | ||
3915c1e8 JV |
4978 | if (fail_over_mac) { |
4979 | fail_over_mac_value = bond_parse_parm(fail_over_mac, | |
4980 | fail_over_mac_tbl); | |
4981 | if (fail_over_mac_value == -1) { | |
4982 | printk(KERN_ERR DRV_NAME | |
4983 | ": Error: invalid fail_over_mac \"%s\"\n", | |
4984 | arp_validate == NULL ? "NULL" : arp_validate); | |
4985 | return -EINVAL; | |
4986 | } | |
4987 | ||
4988 | if (bond_mode != BOND_MODE_ACTIVEBACKUP) | |
4989 | printk(KERN_WARNING DRV_NAME | |
4990 | ": Warning: fail_over_mac only affects " | |
4991 | "active-backup mode.\n"); | |
4992 | } else { | |
4993 | fail_over_mac_value = BOND_FOM_NONE; | |
4994 | } | |
dd957c57 | 4995 | |
1da177e4 LT |
4996 | /* fill params struct with the proper values */ |
4997 | params->mode = bond_mode; | |
169a3e66 | 4998 | params->xmit_policy = xmit_hashtype; |
1da177e4 | 4999 | params->miimon = miimon; |
7893b249 | 5000 | params->num_grat_arp = num_grat_arp; |
1da177e4 | 5001 | params->arp_interval = arp_interval; |
f5b2b966 | 5002 | params->arp_validate = arp_validate_value; |
1da177e4 LT |
5003 | params->updelay = updelay; |
5004 | params->downdelay = downdelay; | |
5005 | params->use_carrier = use_carrier; | |
5006 | params->lacp_fast = lacp_fast; | |
5007 | params->primary[0] = 0; | |
3915c1e8 | 5008 | params->fail_over_mac = fail_over_mac_value; |
1da177e4 LT |
5009 | |
5010 | if (primary) { | |
5011 | strncpy(params->primary, primary, IFNAMSIZ); | |
5012 | params->primary[IFNAMSIZ - 1] = 0; | |
5013 | } | |
5014 | ||
5015 | memcpy(params->arp_targets, arp_target, sizeof(arp_target)); | |
5016 | ||
5017 | return 0; | |
5018 | } | |
5019 | ||
0daa2303 PZ |
5020 | static struct lock_class_key bonding_netdev_xmit_lock_key; |
5021 | ||
dfe60397 | 5022 | /* Create a new bond based on the specified name and bonding parameters. |
e4b91c48 | 5023 | * If name is NULL, obtain a suitable "bond%d" name for us. |
dfe60397 MW |
5024 | * Caller must NOT hold rtnl_lock; we need to release it here before we |
5025 | * set up our sysfs entries. | |
5026 | */ | |
0dd646fe | 5027 | int bond_create(char *name, struct bond_params *params) |
dfe60397 MW |
5028 | { |
5029 | struct net_device *bond_dev; | |
0883beca | 5030 | struct bonding *bond; |
dfe60397 MW |
5031 | int res; |
5032 | ||
5033 | rtnl_lock(); | |
027ea041 JV |
5034 | down_write(&bonding_rwsem); |
5035 | ||
5036 | /* Check to see if the bond already exists. */ | |
4fe4763c | 5037 | if (name) { |
0883beca | 5038 | list_for_each_entry(bond, &bond_dev_list, bond_list) |
4fe4763c JV |
5039 | if (strnicmp(bond->dev->name, name, IFNAMSIZ) == 0) { |
5040 | printk(KERN_ERR DRV_NAME | |
027ea041 | 5041 | ": cannot add bond %s; it already exists\n", |
4fe4763c JV |
5042 | name); |
5043 | res = -EPERM; | |
5044 | goto out_rtnl; | |
5045 | } | |
5046 | } | |
027ea041 | 5047 | |
e4b91c48 JV |
5048 | bond_dev = alloc_netdev(sizeof(struct bonding), name ? name : "", |
5049 | ether_setup); | |
dfe60397 MW |
5050 | if (!bond_dev) { |
5051 | printk(KERN_ERR DRV_NAME | |
5052 | ": %s: eek! can't alloc netdev!\n", | |
5053 | name); | |
5054 | res = -ENOMEM; | |
5055 | goto out_rtnl; | |
5056 | } | |
5057 | ||
e4b91c48 JV |
5058 | if (!name) { |
5059 | res = dev_alloc_name(bond_dev, "bond%d"); | |
5060 | if (res < 0) | |
5061 | goto out_netdev; | |
5062 | } | |
5063 | ||
dfe60397 MW |
5064 | /* bond_init() must be called after dev_alloc_name() (for the |
5065 | * /proc files), but before register_netdevice(), because we | |
5066 | * need to set function pointers. | |
5067 | */ | |
5068 | ||
5069 | res = bond_init(bond_dev, params); | |
5070 | if (res < 0) { | |
5071 | goto out_netdev; | |
5072 | } | |
5073 | ||
dfe60397 MW |
5074 | res = register_netdevice(bond_dev); |
5075 | if (res < 0) { | |
5076 | goto out_bond; | |
5077 | } | |
0daa2303 PZ |
5078 | |
5079 | lockdep_set_class(&bond_dev->_xmit_lock, &bonding_netdev_xmit_lock_key); | |
5080 | ||
ff59c456 JV |
5081 | netif_carrier_off(bond_dev); |
5082 | ||
027ea041 | 5083 | up_write(&bonding_rwsem); |
dfe60397 | 5084 | rtnl_unlock(); /* allows sysfs registration of net device */ |
b76cdba9 | 5085 | res = bond_create_sysfs_entry(bond_dev->priv); |
09c89279 JV |
5086 | if (res < 0) { |
5087 | rtnl_lock(); | |
027ea041 | 5088 | down_write(&bonding_rwsem); |
822973ba PE |
5089 | bond_deinit(bond_dev); |
5090 | unregister_netdevice(bond_dev); | |
5091 | goto out_rtnl; | |
09c89279 JV |
5092 | } |
5093 | ||
5094 | return 0; | |
5095 | ||
dfe60397 MW |
5096 | out_bond: |
5097 | bond_deinit(bond_dev); | |
5098 | out_netdev: | |
5099 | free_netdev(bond_dev); | |
5100 | out_rtnl: | |
027ea041 | 5101 | up_write(&bonding_rwsem); |
dfe60397 | 5102 | rtnl_unlock(); |
dfe60397 MW |
5103 | return res; |
5104 | } | |
5105 | ||
1da177e4 LT |
5106 | static int __init bonding_init(void) |
5107 | { | |
1da177e4 LT |
5108 | int i; |
5109 | int res; | |
0883beca | 5110 | struct bonding *bond; |
1da177e4 LT |
5111 | |
5112 | printk(KERN_INFO "%s", version); | |
5113 | ||
dfe60397 | 5114 | res = bond_check_params(&bonding_defaults); |
1da177e4 | 5115 | if (res) { |
dfe60397 | 5116 | goto out; |
1da177e4 LT |
5117 | } |
5118 | ||
1da177e4 LT |
5119 | #ifdef CONFIG_PROC_FS |
5120 | bond_create_proc_dir(); | |
5121 | #endif | |
027ea041 JV |
5122 | |
5123 | init_rwsem(&bonding_rwsem); | |
5124 | ||
1da177e4 | 5125 | for (i = 0; i < max_bonds; i++) { |
0dd646fe | 5126 | res = bond_create(NULL, &bonding_defaults); |
dfe60397 MW |
5127 | if (res) |
5128 | goto err; | |
1da177e4 LT |
5129 | } |
5130 | ||
b76cdba9 MW |
5131 | res = bond_create_sysfs(); |
5132 | if (res) | |
5133 | goto err; | |
5134 | ||
1da177e4 | 5135 | register_netdevice_notifier(&bond_netdev_notifier); |
c3ade5ca | 5136 | register_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 5137 | |
dfe60397 MW |
5138 | goto out; |
5139 | err: | |
0883beca | 5140 | list_for_each_entry(bond, &bond_dev_list, bond_list) { |
1b76b316 JV |
5141 | bond_work_cancel_all(bond); |
5142 | destroy_workqueue(bond->wq); | |
5143 | } | |
5144 | ||
ae68c398 PE |
5145 | bond_destroy_sysfs(); |
5146 | ||
40abc270 | 5147 | rtnl_lock(); |
1da177e4 | 5148 | bond_free_all(); |
1da177e4 | 5149 | rtnl_unlock(); |
dfe60397 | 5150 | out: |
1da177e4 | 5151 | return res; |
dfe60397 | 5152 | |
1da177e4 LT |
5153 | } |
5154 | ||
5155 | static void __exit bonding_exit(void) | |
5156 | { | |
5157 | unregister_netdevice_notifier(&bond_netdev_notifier); | |
c3ade5ca | 5158 | unregister_inetaddr_notifier(&bond_inetaddr_notifier); |
1da177e4 | 5159 | |
ae68c398 PE |
5160 | bond_destroy_sysfs(); |
5161 | ||
1da177e4 LT |
5162 | rtnl_lock(); |
5163 | bond_free_all(); | |
5164 | rtnl_unlock(); | |
5165 | } | |
5166 | ||
5167 | module_init(bonding_init); | |
5168 | module_exit(bonding_exit); | |
5169 | MODULE_LICENSE("GPL"); | |
5170 | MODULE_VERSION(DRV_VERSION); | |
5171 | MODULE_DESCRIPTION(DRV_DESCRIPTION ", v" DRV_VERSION); | |
5172 | MODULE_AUTHOR("Thomas Davis, tadavis@lbl.gov and many others"); | |
5173 | MODULE_SUPPORTED_DEVICE("most ethernet devices"); | |
5174 | ||
5175 | /* | |
5176 | * Local variables: | |
5177 | * c-indent-level: 8 | |
5178 | * c-basic-offset: 8 | |
5179 | * tab-width: 8 | |
5180 | * End: | |
5181 | */ | |
5182 |