Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * Copyright(c) 1999 - 2004 Intel Corporation. All rights reserved. | |
3 | * | |
4 | * This program is free software; you can redistribute it and/or modify it | |
5 | * under the terms of the GNU General Public License as published by the | |
6 | * Free Software Foundation; either version 2 of the License, or | |
7 | * (at your option) any later version. | |
8 | * | |
9 | * This program is distributed in the hope that it will be useful, but | |
10 | * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY | |
11 | * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
12 | * for more details. | |
13 | * | |
14 | * You should have received a copy of the GNU General Public License along | |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. | |
17 | * | |
18 | * The full GNU General Public License is included in this distribution in the | |
19 | * file called LICENSE. | |
20 | * | |
1da177e4 LT |
21 | */ |
22 | ||
23 | //#define BONDING_DEBUG 1 | |
24 | ||
25 | #include <linux/skbuff.h> | |
26 | #include <linux/netdevice.h> | |
27 | #include <linux/etherdevice.h> | |
28 | #include <linux/pkt_sched.h> | |
29 | #include <linux/spinlock.h> | |
30 | #include <linux/slab.h> | |
31 | #include <linux/timer.h> | |
32 | #include <linux/ip.h> | |
33 | #include <linux/ipv6.h> | |
34 | #include <linux/if_arp.h> | |
35 | #include <linux/if_ether.h> | |
36 | #include <linux/if_bonding.h> | |
37 | #include <linux/if_vlan.h> | |
38 | #include <linux/in.h> | |
39 | #include <net/ipx.h> | |
40 | #include <net/arp.h> | |
41 | #include <asm/byteorder.h> | |
42 | #include "bonding.h" | |
43 | #include "bond_alb.h" | |
44 | ||
45 | ||
46 | #define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */ | |
47 | #define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing. | |
48 | * Used for division - never set | |
49 | * to zero !!! | |
50 | */ | |
51 | #define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of | |
52 | * learning packets to the switch | |
53 | */ | |
54 | ||
55 | #define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \ | |
56 | * ALB_TIMER_TICKS_PER_SEC) | |
57 | ||
58 | #define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \ | |
59 | * ALB_TIMER_TICKS_PER_SEC) | |
60 | ||
61 | #define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table. | |
62 | * Note that this value MUST NOT be smaller | |
63 | * because the key hash table is BYTE wide ! | |
64 | */ | |
65 | ||
66 | ||
67 | #define TLB_NULL_INDEX 0xffffffff | |
68 | #define MAX_LP_BURST 3 | |
69 | ||
70 | /* rlb defs */ | |
71 | #define RLB_HASH_TABLE_SIZE 256 | |
72 | #define RLB_NULL_INDEX 0xffffffff | |
73 | #define RLB_UPDATE_DELAY 2*ALB_TIMER_TICKS_PER_SEC /* 2 seconds */ | |
74 | #define RLB_ARP_BURST_SIZE 2 | |
75 | #define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb | |
76 | * rebalance interval (5 min). | |
77 | */ | |
78 | /* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is | |
79 | * promiscuous after failover | |
80 | */ | |
81 | #define RLB_PROMISC_TIMEOUT 10*ALB_TIMER_TICKS_PER_SEC | |
82 | ||
83 | static const u8 mac_bcast[ETH_ALEN] = {0xff,0xff,0xff,0xff,0xff,0xff}; | |
84 | static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC; | |
85 | ||
86 | #pragma pack(1) | |
87 | struct learning_pkt { | |
88 | u8 mac_dst[ETH_ALEN]; | |
89 | u8 mac_src[ETH_ALEN]; | |
d3bb52b0 | 90 | __be16 type; |
1da177e4 LT |
91 | u8 padding[ETH_ZLEN - ETH_HLEN]; |
92 | }; | |
93 | ||
94 | struct arp_pkt { | |
d3bb52b0 AV |
95 | __be16 hw_addr_space; |
96 | __be16 prot_addr_space; | |
1da177e4 LT |
97 | u8 hw_addr_len; |
98 | u8 prot_addr_len; | |
d3bb52b0 | 99 | __be16 op_code; |
1da177e4 | 100 | u8 mac_src[ETH_ALEN]; /* sender hardware address */ |
d3bb52b0 | 101 | __be32 ip_src; /* sender IP address */ |
1da177e4 | 102 | u8 mac_dst[ETH_ALEN]; /* target hardware address */ |
d3bb52b0 | 103 | __be32 ip_dst; /* target IP address */ |
1da177e4 LT |
104 | }; |
105 | #pragma pack() | |
106 | ||
a16aeb36 ACM |
107 | static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb) |
108 | { | |
d56f90a7 | 109 | return (struct arp_pkt *)skb_network_header(skb); |
a16aeb36 ACM |
110 | } |
111 | ||
1da177e4 LT |
112 | /* Forward declaration */ |
113 | static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]); | |
114 | ||
eddc9ec5 | 115 | static inline u8 _simple_hash(const u8 *hash_start, int hash_size) |
1da177e4 LT |
116 | { |
117 | int i; | |
118 | u8 hash = 0; | |
119 | ||
120 | for (i = 0; i < hash_size; i++) { | |
121 | hash ^= hash_start[i]; | |
122 | } | |
123 | ||
124 | return hash; | |
125 | } | |
126 | ||
127 | /*********************** tlb specific functions ***************************/ | |
128 | ||
129 | static inline void _lock_tx_hashtbl(struct bonding *bond) | |
130 | { | |
6603a6f2 | 131 | spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); |
1da177e4 LT |
132 | } |
133 | ||
134 | static inline void _unlock_tx_hashtbl(struct bonding *bond) | |
135 | { | |
6603a6f2 | 136 | spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); |
1da177e4 LT |
137 | } |
138 | ||
139 | /* Caller must hold tx_hashtbl lock */ | |
140 | static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load) | |
141 | { | |
142 | if (save_load) { | |
143 | entry->load_history = 1 + entry->tx_bytes / | |
144 | BOND_TLB_REBALANCE_INTERVAL; | |
145 | entry->tx_bytes = 0; | |
146 | } | |
147 | ||
148 | entry->tx_slave = NULL; | |
149 | entry->next = TLB_NULL_INDEX; | |
150 | entry->prev = TLB_NULL_INDEX; | |
151 | } | |
152 | ||
153 | static inline void tlb_init_slave(struct slave *slave) | |
154 | { | |
155 | SLAVE_TLB_INFO(slave).load = 0; | |
156 | SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX; | |
157 | } | |
158 | ||
159 | /* Caller must hold bond lock for read */ | |
160 | static void tlb_clear_slave(struct bonding *bond, struct slave *slave, int save_load) | |
161 | { | |
162 | struct tlb_client_info *tx_hash_table; | |
163 | u32 index; | |
164 | ||
165 | _lock_tx_hashtbl(bond); | |
166 | ||
167 | /* clear slave from tx_hashtbl */ | |
168 | tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl; | |
169 | ||
170 | index = SLAVE_TLB_INFO(slave).head; | |
171 | while (index != TLB_NULL_INDEX) { | |
172 | u32 next_index = tx_hash_table[index].next; | |
173 | tlb_init_table_entry(&tx_hash_table[index], save_load); | |
174 | index = next_index; | |
175 | } | |
176 | ||
1da177e4 | 177 | tlb_init_slave(slave); |
5af47b2f JV |
178 | |
179 | _unlock_tx_hashtbl(bond); | |
1da177e4 LT |
180 | } |
181 | ||
182 | /* Must be called before starting the monitor timer */ | |
183 | static int tlb_initialize(struct bonding *bond) | |
184 | { | |
185 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
186 | int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info); | |
0d206a3a | 187 | struct tlb_client_info *new_hashtbl; |
1da177e4 LT |
188 | int i; |
189 | ||
190 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
191 | ||
243cb4e5 | 192 | new_hashtbl = kzalloc(size, GFP_KERNEL); |
0d206a3a | 193 | if (!new_hashtbl) { |
1da177e4 | 194 | printk(KERN_ERR DRV_NAME |
4e0952c7 | 195 | ": %s: Error: Failed to allocate TLB hash table\n", |
1da177e4 | 196 | bond->dev->name); |
1da177e4 LT |
197 | return -1; |
198 | } | |
0d206a3a MW |
199 | _lock_tx_hashtbl(bond); |
200 | ||
201 | bond_info->tx_hashtbl = new_hashtbl; | |
1da177e4 | 202 | |
1da177e4 LT |
203 | for (i = 0; i < TLB_HASH_TABLE_SIZE; i++) { |
204 | tlb_init_table_entry(&bond_info->tx_hashtbl[i], 1); | |
205 | } | |
206 | ||
207 | _unlock_tx_hashtbl(bond); | |
208 | ||
209 | return 0; | |
210 | } | |
211 | ||
212 | /* Must be called only after all slaves have been released */ | |
213 | static void tlb_deinitialize(struct bonding *bond) | |
214 | { | |
215 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
216 | ||
217 | _lock_tx_hashtbl(bond); | |
218 | ||
219 | kfree(bond_info->tx_hashtbl); | |
220 | bond_info->tx_hashtbl = NULL; | |
221 | ||
222 | _unlock_tx_hashtbl(bond); | |
223 | } | |
224 | ||
225 | /* Caller must hold bond lock for read */ | |
226 | static struct slave *tlb_get_least_loaded_slave(struct bonding *bond) | |
227 | { | |
228 | struct slave *slave, *least_loaded; | |
229 | s64 max_gap; | |
230 | int i, found = 0; | |
231 | ||
232 | /* Find the first enabled slave */ | |
233 | bond_for_each_slave(bond, slave, i) { | |
234 | if (SLAVE_IS_OK(slave)) { | |
235 | found = 1; | |
236 | break; | |
237 | } | |
238 | } | |
239 | ||
240 | if (!found) { | |
241 | return NULL; | |
242 | } | |
243 | ||
244 | least_loaded = slave; | |
245 | max_gap = (s64)(slave->speed << 20) - /* Convert to Megabit per sec */ | |
246 | (s64)(SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */ | |
247 | ||
248 | /* Find the slave with the largest gap */ | |
249 | bond_for_each_slave_from(bond, slave, i, least_loaded) { | |
250 | if (SLAVE_IS_OK(slave)) { | |
251 | s64 gap = (s64)(slave->speed << 20) - | |
252 | (s64)(SLAVE_TLB_INFO(slave).load << 3); | |
253 | if (max_gap < gap) { | |
254 | least_loaded = slave; | |
255 | max_gap = gap; | |
256 | } | |
257 | } | |
258 | } | |
259 | ||
260 | return least_loaded; | |
261 | } | |
262 | ||
263 | /* Caller must hold bond lock for read */ | |
264 | static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u32 skb_len) | |
265 | { | |
266 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
267 | struct tlb_client_info *hash_table; | |
268 | struct slave *assigned_slave; | |
269 | ||
270 | _lock_tx_hashtbl(bond); | |
271 | ||
272 | hash_table = bond_info->tx_hashtbl; | |
273 | assigned_slave = hash_table[hash_index].tx_slave; | |
274 | if (!assigned_slave) { | |
275 | assigned_slave = tlb_get_least_loaded_slave(bond); | |
276 | ||
277 | if (assigned_slave) { | |
278 | struct tlb_slave_info *slave_info = | |
279 | &(SLAVE_TLB_INFO(assigned_slave)); | |
280 | u32 next_index = slave_info->head; | |
281 | ||
282 | hash_table[hash_index].tx_slave = assigned_slave; | |
283 | hash_table[hash_index].next = next_index; | |
284 | hash_table[hash_index].prev = TLB_NULL_INDEX; | |
285 | ||
286 | if (next_index != TLB_NULL_INDEX) { | |
287 | hash_table[next_index].prev = hash_index; | |
288 | } | |
289 | ||
290 | slave_info->head = hash_index; | |
291 | slave_info->load += | |
292 | hash_table[hash_index].load_history; | |
293 | } | |
294 | } | |
295 | ||
296 | if (assigned_slave) { | |
297 | hash_table[hash_index].tx_bytes += skb_len; | |
298 | } | |
299 | ||
300 | _unlock_tx_hashtbl(bond); | |
301 | ||
302 | return assigned_slave; | |
303 | } | |
304 | ||
305 | /*********************** rlb specific functions ***************************/ | |
306 | static inline void _lock_rx_hashtbl(struct bonding *bond) | |
307 | { | |
6603a6f2 | 308 | spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
1da177e4 LT |
309 | } |
310 | ||
311 | static inline void _unlock_rx_hashtbl(struct bonding *bond) | |
312 | { | |
6603a6f2 | 313 | spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
1da177e4 LT |
314 | } |
315 | ||
316 | /* when an ARP REPLY is received from a client update its info | |
317 | * in the rx_hashtbl | |
318 | */ | |
319 | static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp) | |
320 | { | |
321 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
322 | struct rlb_client_info *client_info; | |
323 | u32 hash_index; | |
324 | ||
325 | _lock_rx_hashtbl(bond); | |
326 | ||
327 | hash_index = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src)); | |
328 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
329 | ||
330 | if ((client_info->assigned) && | |
331 | (client_info->ip_src == arp->ip_dst) && | |
332 | (client_info->ip_dst == arp->ip_src)) { | |
333 | /* update the clients MAC address */ | |
334 | memcpy(client_info->mac_dst, arp->mac_src, ETH_ALEN); | |
335 | client_info->ntt = 1; | |
336 | bond_info->rx_ntt = 1; | |
337 | } | |
338 | ||
339 | _unlock_rx_hashtbl(bond); | |
340 | } | |
341 | ||
f2ccd8fa | 342 | static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct packet_type *ptype, struct net_device *orig_dev) |
1da177e4 LT |
343 | { |
344 | struct bonding *bond = bond_dev->priv; | |
345 | struct arp_pkt *arp = (struct arp_pkt *)skb->data; | |
346 | int res = NET_RX_DROP; | |
347 | ||
e730c155 EB |
348 | if (bond_dev->nd_net != &init_net) |
349 | goto out; | |
350 | ||
f2ccd8fa | 351 | if (!(bond_dev->flags & IFF_MASTER)) |
1da177e4 | 352 | goto out; |
1da177e4 LT |
353 | |
354 | if (!arp) { | |
355 | dprintk("Packet has no ARP data\n"); | |
356 | goto out; | |
357 | } | |
358 | ||
359 | if (skb->len < sizeof(struct arp_pkt)) { | |
360 | dprintk("Packet is too small to be an ARP\n"); | |
361 | goto out; | |
362 | } | |
363 | ||
364 | if (arp->op_code == htons(ARPOP_REPLY)) { | |
365 | /* update rx hash table for this ARP */ | |
366 | rlb_update_entry_from_arp(bond, arp); | |
367 | dprintk("Server received an ARP Reply from client\n"); | |
368 | } | |
369 | ||
370 | res = NET_RX_SUCCESS; | |
371 | ||
372 | out: | |
373 | dev_kfree_skb(skb); | |
374 | ||
375 | return res; | |
376 | } | |
377 | ||
378 | /* Caller must hold bond lock for read */ | |
379 | static struct slave *rlb_next_rx_slave(struct bonding *bond) | |
380 | { | |
381 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
382 | struct slave *rx_slave, *slave, *start_at; | |
383 | int i = 0; | |
384 | ||
385 | if (bond_info->next_rx_slave) { | |
386 | start_at = bond_info->next_rx_slave; | |
387 | } else { | |
388 | start_at = bond->first_slave; | |
389 | } | |
390 | ||
391 | rx_slave = NULL; | |
392 | ||
393 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
394 | if (SLAVE_IS_OK(slave)) { | |
395 | if (!rx_slave) { | |
396 | rx_slave = slave; | |
397 | } else if (slave->speed > rx_slave->speed) { | |
398 | rx_slave = slave; | |
399 | } | |
400 | } | |
401 | } | |
402 | ||
403 | if (rx_slave) { | |
404 | bond_info->next_rx_slave = rx_slave->next; | |
405 | } | |
406 | ||
407 | return rx_slave; | |
408 | } | |
409 | ||
410 | /* teach the switch the mac of a disabled slave | |
411 | * on the primary for fault tolerance | |
412 | * | |
413 | * Caller must hold bond->curr_slave_lock for write or bond lock for write | |
414 | */ | |
415 | static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[]) | |
416 | { | |
417 | if (!bond->curr_active_slave) { | |
418 | return; | |
419 | } | |
420 | ||
421 | if (!bond->alb_info.primary_is_promisc) { | |
422 | bond->alb_info.primary_is_promisc = 1; | |
423 | dev_set_promiscuity(bond->curr_active_slave->dev, 1); | |
424 | } | |
425 | ||
426 | bond->alb_info.rlb_promisc_timeout_counter = 0; | |
427 | ||
428 | alb_send_learning_packets(bond->curr_active_slave, addr); | |
429 | } | |
430 | ||
431 | /* slave being removed should not be active at this point | |
432 | * | |
433 | * Caller must hold bond lock for read | |
434 | */ | |
435 | static void rlb_clear_slave(struct bonding *bond, struct slave *slave) | |
436 | { | |
437 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
438 | struct rlb_client_info *rx_hash_table; | |
439 | u32 index, next_index; | |
440 | ||
441 | /* clear slave from rx_hashtbl */ | |
442 | _lock_rx_hashtbl(bond); | |
443 | ||
444 | rx_hash_table = bond_info->rx_hashtbl; | |
445 | index = bond_info->rx_hashtbl_head; | |
446 | for (; index != RLB_NULL_INDEX; index = next_index) { | |
447 | next_index = rx_hash_table[index].next; | |
448 | if (rx_hash_table[index].slave == slave) { | |
449 | struct slave *assigned_slave = rlb_next_rx_slave(bond); | |
450 | ||
451 | if (assigned_slave) { | |
452 | rx_hash_table[index].slave = assigned_slave; | |
453 | if (memcmp(rx_hash_table[index].mac_dst, | |
454 | mac_bcast, ETH_ALEN)) { | |
455 | bond_info->rx_hashtbl[index].ntt = 1; | |
456 | bond_info->rx_ntt = 1; | |
457 | /* A slave has been removed from the | |
458 | * table because it is either disabled | |
459 | * or being released. We must retry the | |
460 | * update to avoid clients from not | |
461 | * being updated & disconnecting when | |
462 | * there is stress | |
463 | */ | |
464 | bond_info->rlb_update_retry_counter = | |
465 | RLB_UPDATE_RETRY; | |
466 | } | |
467 | } else { /* there is no active slave */ | |
468 | rx_hash_table[index].slave = NULL; | |
469 | } | |
470 | } | |
471 | } | |
472 | ||
473 | _unlock_rx_hashtbl(bond); | |
474 | ||
6603a6f2 | 475 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
476 | |
477 | if (slave != bond->curr_active_slave) { | |
478 | rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr); | |
479 | } | |
480 | ||
6603a6f2 | 481 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
482 | } |
483 | ||
484 | static void rlb_update_client(struct rlb_client_info *client_info) | |
485 | { | |
486 | int i; | |
487 | ||
488 | if (!client_info->slave) { | |
489 | return; | |
490 | } | |
491 | ||
492 | for (i = 0; i < RLB_ARP_BURST_SIZE; i++) { | |
493 | struct sk_buff *skb; | |
494 | ||
495 | skb = arp_create(ARPOP_REPLY, ETH_P_ARP, | |
496 | client_info->ip_dst, | |
497 | client_info->slave->dev, | |
498 | client_info->ip_src, | |
499 | client_info->mac_dst, | |
500 | client_info->slave->dev->dev_addr, | |
501 | client_info->mac_dst); | |
502 | if (!skb) { | |
503 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
504 | ": %s: Error: failed to create an ARP packet\n", |
505 | client_info->slave->dev->master->name); | |
1da177e4 LT |
506 | continue; |
507 | } | |
508 | ||
509 | skb->dev = client_info->slave->dev; | |
510 | ||
511 | if (client_info->tag) { | |
512 | skb = vlan_put_tag(skb, client_info->vlan_id); | |
513 | if (!skb) { | |
514 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
515 | ": %s: Error: failed to insert VLAN tag\n", |
516 | client_info->slave->dev->master->name); | |
1da177e4 LT |
517 | continue; |
518 | } | |
519 | } | |
520 | ||
521 | arp_xmit(skb); | |
522 | } | |
523 | } | |
524 | ||
525 | /* sends ARP REPLIES that update the clients that need updating */ | |
526 | static void rlb_update_rx_clients(struct bonding *bond) | |
527 | { | |
528 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
529 | struct rlb_client_info *client_info; | |
530 | u32 hash_index; | |
531 | ||
532 | _lock_rx_hashtbl(bond); | |
533 | ||
534 | hash_index = bond_info->rx_hashtbl_head; | |
535 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
536 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
537 | if (client_info->ntt) { | |
538 | rlb_update_client(client_info); | |
539 | if (bond_info->rlb_update_retry_counter == 0) { | |
540 | client_info->ntt = 0; | |
541 | } | |
542 | } | |
543 | } | |
544 | ||
545 | /* do not update the entries again untill this counter is zero so that | |
546 | * not to confuse the clients. | |
547 | */ | |
548 | bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY; | |
549 | ||
550 | _unlock_rx_hashtbl(bond); | |
551 | } | |
552 | ||
553 | /* The slave was assigned a new mac address - update the clients */ | |
554 | static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave) | |
555 | { | |
556 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
557 | struct rlb_client_info *client_info; | |
558 | int ntt = 0; | |
559 | u32 hash_index; | |
560 | ||
561 | _lock_rx_hashtbl(bond); | |
562 | ||
563 | hash_index = bond_info->rx_hashtbl_head; | |
564 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
565 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
566 | ||
567 | if ((client_info->slave == slave) && | |
568 | memcmp(client_info->mac_dst, mac_bcast, ETH_ALEN)) { | |
569 | client_info->ntt = 1; | |
570 | ntt = 1; | |
571 | } | |
572 | } | |
573 | ||
574 | // update the team's flag only after the whole iteration | |
575 | if (ntt) { | |
576 | bond_info->rx_ntt = 1; | |
577 | //fasten the change | |
578 | bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY; | |
579 | } | |
580 | ||
581 | _unlock_rx_hashtbl(bond); | |
582 | } | |
583 | ||
584 | /* mark all clients using src_ip to be updated */ | |
d3bb52b0 | 585 | static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip) |
1da177e4 LT |
586 | { |
587 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
588 | struct rlb_client_info *client_info; | |
589 | u32 hash_index; | |
590 | ||
591 | _lock_rx_hashtbl(bond); | |
592 | ||
593 | hash_index = bond_info->rx_hashtbl_head; | |
594 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
595 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
596 | ||
597 | if (!client_info->slave) { | |
598 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
599 | ": %s: Error: found a client with no channel in " |
600 | "the client's hash table\n", | |
601 | bond->dev->name); | |
1da177e4 LT |
602 | continue; |
603 | } | |
604 | /*update all clients using this src_ip, that are not assigned | |
605 | * to the team's address (curr_active_slave) and have a known | |
606 | * unicast mac address. | |
607 | */ | |
608 | if ((client_info->ip_src == src_ip) && | |
609 | memcmp(client_info->slave->dev->dev_addr, | |
610 | bond->dev->dev_addr, ETH_ALEN) && | |
611 | memcmp(client_info->mac_dst, mac_bcast, ETH_ALEN)) { | |
612 | client_info->ntt = 1; | |
613 | bond_info->rx_ntt = 1; | |
614 | } | |
615 | } | |
616 | ||
617 | _unlock_rx_hashtbl(bond); | |
618 | } | |
619 | ||
620 | /* Caller must hold both bond and ptr locks for read */ | |
621 | static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond) | |
622 | { | |
623 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
a16aeb36 | 624 | struct arp_pkt *arp = arp_pkt(skb); |
1da177e4 LT |
625 | struct slave *assigned_slave; |
626 | struct rlb_client_info *client_info; | |
627 | u32 hash_index = 0; | |
628 | ||
629 | _lock_rx_hashtbl(bond); | |
630 | ||
631 | hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_src)); | |
632 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
633 | ||
634 | if (client_info->assigned) { | |
635 | if ((client_info->ip_src == arp->ip_src) && | |
636 | (client_info->ip_dst == arp->ip_dst)) { | |
637 | /* the entry is already assigned to this client */ | |
638 | if (memcmp(arp->mac_dst, mac_bcast, ETH_ALEN)) { | |
639 | /* update mac address from arp */ | |
640 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); | |
641 | } | |
642 | ||
643 | assigned_slave = client_info->slave; | |
644 | if (assigned_slave) { | |
645 | _unlock_rx_hashtbl(bond); | |
646 | return assigned_slave; | |
647 | } | |
648 | } else { | |
649 | /* the entry is already assigned to some other client, | |
650 | * move the old client to primary (curr_active_slave) so | |
651 | * that the new client can be assigned to this entry. | |
652 | */ | |
653 | if (bond->curr_active_slave && | |
654 | client_info->slave != bond->curr_active_slave) { | |
655 | client_info->slave = bond->curr_active_slave; | |
656 | rlb_update_client(client_info); | |
657 | } | |
658 | } | |
659 | } | |
660 | /* assign a new slave */ | |
661 | assigned_slave = rlb_next_rx_slave(bond); | |
662 | ||
663 | if (assigned_slave) { | |
664 | client_info->ip_src = arp->ip_src; | |
665 | client_info->ip_dst = arp->ip_dst; | |
666 | /* arp->mac_dst is broadcast for arp reqeusts. | |
667 | * will be updated with clients actual unicast mac address | |
668 | * upon receiving an arp reply. | |
669 | */ | |
670 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); | |
671 | client_info->slave = assigned_slave; | |
672 | ||
673 | if (memcmp(client_info->mac_dst, mac_bcast, ETH_ALEN)) { | |
674 | client_info->ntt = 1; | |
675 | bond->alb_info.rx_ntt = 1; | |
676 | } else { | |
677 | client_info->ntt = 0; | |
678 | } | |
679 | ||
680 | if (!list_empty(&bond->vlan_list)) { | |
681 | unsigned short vlan_id; | |
682 | int res = vlan_get_tag(skb, &vlan_id); | |
683 | if (!res) { | |
684 | client_info->tag = 1; | |
685 | client_info->vlan_id = vlan_id; | |
686 | } | |
687 | } | |
688 | ||
689 | if (!client_info->assigned) { | |
690 | u32 prev_tbl_head = bond_info->rx_hashtbl_head; | |
691 | bond_info->rx_hashtbl_head = hash_index; | |
692 | client_info->next = prev_tbl_head; | |
693 | if (prev_tbl_head != RLB_NULL_INDEX) { | |
694 | bond_info->rx_hashtbl[prev_tbl_head].prev = | |
695 | hash_index; | |
696 | } | |
697 | client_info->assigned = 1; | |
698 | } | |
699 | } | |
700 | ||
701 | _unlock_rx_hashtbl(bond); | |
702 | ||
703 | return assigned_slave; | |
704 | } | |
705 | ||
706 | /* chooses (and returns) transmit channel for arp reply | |
707 | * does not choose channel for other arp types since they are | |
708 | * sent on the curr_active_slave | |
709 | */ | |
710 | static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond) | |
711 | { | |
a16aeb36 | 712 | struct arp_pkt *arp = arp_pkt(skb); |
1da177e4 LT |
713 | struct slave *tx_slave = NULL; |
714 | ||
715 | if (arp->op_code == __constant_htons(ARPOP_REPLY)) { | |
716 | /* the arp must be sent on the selected | |
717 | * rx channel | |
718 | */ | |
719 | tx_slave = rlb_choose_channel(skb, bond); | |
720 | if (tx_slave) { | |
721 | memcpy(arp->mac_src,tx_slave->dev->dev_addr, ETH_ALEN); | |
722 | } | |
723 | dprintk("Server sent ARP Reply packet\n"); | |
724 | } else if (arp->op_code == __constant_htons(ARPOP_REQUEST)) { | |
725 | /* Create an entry in the rx_hashtbl for this client as a | |
726 | * place holder. | |
727 | * When the arp reply is received the entry will be updated | |
728 | * with the correct unicast address of the client. | |
729 | */ | |
730 | rlb_choose_channel(skb, bond); | |
731 | ||
732 | /* The ARP relpy packets must be delayed so that | |
733 | * they can cancel out the influence of the ARP request. | |
734 | */ | |
735 | bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY; | |
736 | ||
737 | /* arp requests are broadcast and are sent on the primary | |
738 | * the arp request will collapse all clients on the subnet to | |
739 | * the primary slave. We must register these clients to be | |
740 | * updated with their assigned mac. | |
741 | */ | |
742 | rlb_req_update_subnet_clients(bond, arp->ip_src); | |
743 | dprintk("Server sent ARP Request packet\n"); | |
744 | } | |
745 | ||
746 | return tx_slave; | |
747 | } | |
748 | ||
749 | /* Caller must hold bond lock for read */ | |
750 | static void rlb_rebalance(struct bonding *bond) | |
751 | { | |
752 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
753 | struct slave *assigned_slave; | |
754 | struct rlb_client_info *client_info; | |
755 | int ntt; | |
756 | u32 hash_index; | |
757 | ||
758 | _lock_rx_hashtbl(bond); | |
759 | ||
760 | ntt = 0; | |
761 | hash_index = bond_info->rx_hashtbl_head; | |
762 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
763 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
764 | assigned_slave = rlb_next_rx_slave(bond); | |
765 | if (assigned_slave && (client_info->slave != assigned_slave)) { | |
766 | client_info->slave = assigned_slave; | |
767 | client_info->ntt = 1; | |
768 | ntt = 1; | |
769 | } | |
770 | } | |
771 | ||
772 | /* update the team's flag only after the whole iteration */ | |
773 | if (ntt) { | |
774 | bond_info->rx_ntt = 1; | |
775 | } | |
776 | _unlock_rx_hashtbl(bond); | |
777 | } | |
778 | ||
779 | /* Caller must hold rx_hashtbl lock */ | |
780 | static void rlb_init_table_entry(struct rlb_client_info *entry) | |
781 | { | |
782 | memset(entry, 0, sizeof(struct rlb_client_info)); | |
783 | entry->next = RLB_NULL_INDEX; | |
784 | entry->prev = RLB_NULL_INDEX; | |
785 | } | |
786 | ||
787 | static int rlb_initialize(struct bonding *bond) | |
788 | { | |
789 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
790 | struct packet_type *pk_type = &(BOND_ALB_INFO(bond).rlb_pkt_type); | |
0d206a3a | 791 | struct rlb_client_info *new_hashtbl; |
1da177e4 LT |
792 | int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info); |
793 | int i; | |
794 | ||
795 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
796 | ||
0d206a3a MW |
797 | new_hashtbl = kmalloc(size, GFP_KERNEL); |
798 | if (!new_hashtbl) { | |
1da177e4 | 799 | printk(KERN_ERR DRV_NAME |
4e0952c7 | 800 | ": %s: Error: Failed to allocate RLB hash table\n", |
1da177e4 | 801 | bond->dev->name); |
1da177e4 LT |
802 | return -1; |
803 | } | |
0d206a3a MW |
804 | _lock_rx_hashtbl(bond); |
805 | ||
806 | bond_info->rx_hashtbl = new_hashtbl; | |
1da177e4 LT |
807 | |
808 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; | |
809 | ||
810 | for (i = 0; i < RLB_HASH_TABLE_SIZE; i++) { | |
811 | rlb_init_table_entry(bond_info->rx_hashtbl + i); | |
812 | } | |
813 | ||
814 | _unlock_rx_hashtbl(bond); | |
815 | ||
816 | /*initialize packet type*/ | |
817 | pk_type->type = __constant_htons(ETH_P_ARP); | |
818 | pk_type->dev = bond->dev; | |
819 | pk_type->func = rlb_arp_recv; | |
820 | ||
821 | /* register to receive ARPs */ | |
822 | dev_add_pack(pk_type); | |
823 | ||
824 | return 0; | |
825 | } | |
826 | ||
827 | static void rlb_deinitialize(struct bonding *bond) | |
828 | { | |
829 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
830 | ||
831 | dev_remove_pack(&(bond_info->rlb_pkt_type)); | |
832 | ||
833 | _lock_rx_hashtbl(bond); | |
834 | ||
835 | kfree(bond_info->rx_hashtbl); | |
836 | bond_info->rx_hashtbl = NULL; | |
837 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; | |
838 | ||
839 | _unlock_rx_hashtbl(bond); | |
840 | } | |
841 | ||
842 | static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id) | |
843 | { | |
844 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
845 | u32 curr_index; | |
846 | ||
847 | _lock_rx_hashtbl(bond); | |
848 | ||
849 | curr_index = bond_info->rx_hashtbl_head; | |
850 | while (curr_index != RLB_NULL_INDEX) { | |
851 | struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]); | |
852 | u32 next_index = bond_info->rx_hashtbl[curr_index].next; | |
853 | u32 prev_index = bond_info->rx_hashtbl[curr_index].prev; | |
854 | ||
855 | if (curr->tag && (curr->vlan_id == vlan_id)) { | |
856 | if (curr_index == bond_info->rx_hashtbl_head) { | |
857 | bond_info->rx_hashtbl_head = next_index; | |
858 | } | |
859 | if (prev_index != RLB_NULL_INDEX) { | |
860 | bond_info->rx_hashtbl[prev_index].next = next_index; | |
861 | } | |
862 | if (next_index != RLB_NULL_INDEX) { | |
863 | bond_info->rx_hashtbl[next_index].prev = prev_index; | |
864 | } | |
865 | ||
866 | rlb_init_table_entry(curr); | |
867 | } | |
868 | ||
869 | curr_index = next_index; | |
870 | } | |
871 | ||
872 | _unlock_rx_hashtbl(bond); | |
873 | } | |
874 | ||
875 | /*********************** tlb/rlb shared functions *********************/ | |
876 | ||
877 | static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]) | |
878 | { | |
879 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
880 | struct learning_pkt pkt; | |
881 | int size = sizeof(struct learning_pkt); | |
882 | int i; | |
883 | ||
884 | memset(&pkt, 0, size); | |
885 | memcpy(pkt.mac_dst, mac_addr, ETH_ALEN); | |
886 | memcpy(pkt.mac_src, mac_addr, ETH_ALEN); | |
887 | pkt.type = __constant_htons(ETH_P_LOOP); | |
888 | ||
889 | for (i = 0; i < MAX_LP_BURST; i++) { | |
890 | struct sk_buff *skb; | |
891 | char *data; | |
892 | ||
893 | skb = dev_alloc_skb(size); | |
894 | if (!skb) { | |
895 | return; | |
896 | } | |
897 | ||
898 | data = skb_put(skb, size); | |
899 | memcpy(data, &pkt, size); | |
900 | ||
459a98ed | 901 | skb_reset_mac_header(skb); |
b0e380b1 | 902 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
903 | skb->protocol = pkt.type; |
904 | skb->priority = TC_PRIO_CONTROL; | |
905 | skb->dev = slave->dev; | |
906 | ||
907 | if (!list_empty(&bond->vlan_list)) { | |
908 | struct vlan_entry *vlan; | |
909 | ||
910 | vlan = bond_next_vlan(bond, | |
911 | bond->alb_info.current_alb_vlan); | |
912 | ||
913 | bond->alb_info.current_alb_vlan = vlan; | |
914 | if (!vlan) { | |
915 | kfree_skb(skb); | |
916 | continue; | |
917 | } | |
918 | ||
919 | skb = vlan_put_tag(skb, vlan->vlan_id); | |
920 | if (!skb) { | |
921 | printk(KERN_ERR DRV_NAME | |
4e0952c7 MW |
922 | ": %s: Error: failed to insert VLAN tag\n", |
923 | bond->dev->name); | |
1da177e4 LT |
924 | continue; |
925 | } | |
926 | } | |
927 | ||
928 | dev_queue_xmit(skb); | |
929 | } | |
930 | } | |
931 | ||
932 | /* hw is a boolean parameter that determines whether we should try and | |
933 | * set the hw address of the device as well as the hw address of the | |
934 | * net_device | |
935 | */ | |
936 | static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[], int hw) | |
937 | { | |
938 | struct net_device *dev = slave->dev; | |
939 | struct sockaddr s_addr; | |
940 | ||
941 | if (!hw) { | |
942 | memcpy(dev->dev_addr, addr, dev->addr_len); | |
943 | return 0; | |
944 | } | |
945 | ||
946 | /* for rlb each slave must have a unique hw mac addresses so that */ | |
947 | /* each slave will receive packets destined to a different mac */ | |
948 | memcpy(s_addr.sa_data, addr, dev->addr_len); | |
949 | s_addr.sa_family = dev->type; | |
950 | if (dev_set_mac_address(dev, &s_addr)) { | |
951 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 952 | ": %s: Error: dev_set_mac_address of dev %s failed! ALB " |
1da177e4 LT |
953 | "mode requires that the base driver support setting " |
954 | "the hw address also when the network device's " | |
955 | "interface is open\n", | |
4e0952c7 | 956 | dev->master->name, dev->name); |
1da177e4 LT |
957 | return -EOPNOTSUPP; |
958 | } | |
959 | return 0; | |
960 | } | |
961 | ||
059fe7a5 JV |
962 | /* |
963 | * Swap MAC addresses between two slaves. | |
964 | * | |
965 | * Called with RTNL held, and no other locks. | |
966 | * | |
967 | */ | |
968 | ||
1da177e4 LT |
969 | static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct slave *slave2) |
970 | { | |
1da177e4 | 971 | u8 tmp_mac_addr[ETH_ALEN]; |
1da177e4 LT |
972 | |
973 | memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN); | |
974 | alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr, bond->alb_info.rlb_enabled); | |
975 | alb_set_slave_mac_addr(slave2, tmp_mac_addr, bond->alb_info.rlb_enabled); | |
976 | ||
059fe7a5 JV |
977 | } |
978 | ||
979 | /* | |
980 | * Send learning packets after MAC address swap. | |
981 | * | |
2543331d | 982 | * Called with RTNL and no other locks |
059fe7a5 JV |
983 | */ |
984 | static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1, | |
985 | struct slave *slave2) | |
986 | { | |
987 | int slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2)); | |
988 | struct slave *disabled_slave = NULL; | |
989 | ||
2543331d JV |
990 | ASSERT_RTNL(); |
991 | ||
1da177e4 LT |
992 | /* fasten the change in the switch */ |
993 | if (SLAVE_IS_OK(slave1)) { | |
994 | alb_send_learning_packets(slave1, slave1->dev->dev_addr); | |
995 | if (bond->alb_info.rlb_enabled) { | |
996 | /* inform the clients that the mac address | |
997 | * has changed | |
998 | */ | |
999 | rlb_req_update_slave_clients(bond, slave1); | |
1000 | } | |
1001 | } else { | |
1002 | disabled_slave = slave1; | |
1003 | } | |
1004 | ||
1005 | if (SLAVE_IS_OK(slave2)) { | |
1006 | alb_send_learning_packets(slave2, slave2->dev->dev_addr); | |
1007 | if (bond->alb_info.rlb_enabled) { | |
1008 | /* inform the clients that the mac address | |
1009 | * has changed | |
1010 | */ | |
1011 | rlb_req_update_slave_clients(bond, slave2); | |
1012 | } | |
1013 | } else { | |
1014 | disabled_slave = slave2; | |
1015 | } | |
1016 | ||
1017 | if (bond->alb_info.rlb_enabled && slaves_state_differ) { | |
1018 | /* A disabled slave was assigned an active mac addr */ | |
1019 | rlb_teach_disabled_mac_on_primary(bond, | |
1020 | disabled_slave->dev->dev_addr); | |
1021 | } | |
1022 | } | |
1023 | ||
1024 | /** | |
1025 | * alb_change_hw_addr_on_detach | |
1026 | * @bond: bonding we're working on | |
1027 | * @slave: the slave that was just detached | |
1028 | * | |
1029 | * We assume that @slave was already detached from the slave list. | |
1030 | * | |
1031 | * If @slave's permanent hw address is different both from its current | |
1032 | * address and from @bond's address, then somewhere in the bond there's | |
1033 | * a slave that has @slave's permanet address as its current address. | |
1034 | * We'll make sure that that slave no longer uses @slave's permanent address. | |
1035 | * | |
2543331d | 1036 | * Caller must hold RTNL and no other locks |
1da177e4 LT |
1037 | */ |
1038 | static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave) | |
1039 | { | |
1040 | int perm_curr_diff; | |
1041 | int perm_bond_diff; | |
1042 | ||
1043 | perm_curr_diff = memcmp(slave->perm_hwaddr, | |
1044 | slave->dev->dev_addr, | |
1045 | ETH_ALEN); | |
1046 | perm_bond_diff = memcmp(slave->perm_hwaddr, | |
1047 | bond->dev->dev_addr, | |
1048 | ETH_ALEN); | |
1049 | ||
1050 | if (perm_curr_diff && perm_bond_diff) { | |
1051 | struct slave *tmp_slave; | |
1052 | int i, found = 0; | |
1053 | ||
1054 | bond_for_each_slave(bond, tmp_slave, i) { | |
1055 | if (!memcmp(slave->perm_hwaddr, | |
1056 | tmp_slave->dev->dev_addr, | |
1057 | ETH_ALEN)) { | |
1058 | found = 1; | |
1059 | break; | |
1060 | } | |
1061 | } | |
1062 | ||
1063 | if (found) { | |
059fe7a5 | 1064 | /* locking: needs RTNL and nothing else */ |
1da177e4 | 1065 | alb_swap_mac_addr(bond, slave, tmp_slave); |
059fe7a5 | 1066 | alb_fasten_mac_swap(bond, slave, tmp_slave); |
1da177e4 LT |
1067 | } |
1068 | } | |
1069 | } | |
1070 | ||
1071 | /** | |
1072 | * alb_handle_addr_collision_on_attach | |
1073 | * @bond: bonding we're working on | |
1074 | * @slave: the slave that was just attached | |
1075 | * | |
1076 | * checks uniqueness of slave's mac address and handles the case the | |
1077 | * new slave uses the bonds mac address. | |
1078 | * | |
1079 | * If the permanent hw address of @slave is @bond's hw address, we need to | |
1080 | * find a different hw address to give @slave, that isn't in use by any other | |
1081 | * slave in the bond. This address must be, of course, one of the premanent | |
1082 | * addresses of the other slaves. | |
1083 | * | |
1084 | * We go over the slave list, and for each slave there we compare its | |
1085 | * permanent hw address with the current address of all the other slaves. | |
1086 | * If no match was found, then we've found a slave with a permanent address | |
1087 | * that isn't used by any other slave in the bond, so we can assign it to | |
1088 | * @slave. | |
1089 | * | |
1090 | * assumption: this function is called before @slave is attached to the | |
1091 | * bond slave list. | |
1092 | * | |
1093 | * caller must hold the bond lock for write since the mac addresses are compared | |
1094 | * and may be swapped. | |
1095 | */ | |
1096 | static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave) | |
1097 | { | |
1098 | struct slave *tmp_slave1, *tmp_slave2, *free_mac_slave; | |
1099 | struct slave *has_bond_addr = bond->curr_active_slave; | |
1100 | int i, j, found = 0; | |
1101 | ||
1102 | if (bond->slave_cnt == 0) { | |
1103 | /* this is the first slave */ | |
1104 | return 0; | |
1105 | } | |
1106 | ||
1107 | /* if slave's mac address differs from bond's mac address | |
1108 | * check uniqueness of slave's mac address against the other | |
1109 | * slaves in the bond. | |
1110 | */ | |
1111 | if (memcmp(slave->perm_hwaddr, bond->dev->dev_addr, ETH_ALEN)) { | |
1112 | bond_for_each_slave(bond, tmp_slave1, i) { | |
1113 | if (!memcmp(tmp_slave1->dev->dev_addr, slave->dev->dev_addr, | |
1114 | ETH_ALEN)) { | |
1115 | found = 1; | |
1116 | break; | |
1117 | } | |
1118 | } | |
1119 | ||
6b38aefe JL |
1120 | if (!found) |
1121 | return 0; | |
1da177e4 | 1122 | |
6b38aefe JL |
1123 | /* Try setting slave mac to bond address and fall-through |
1124 | to code handling that situation below... */ | |
1125 | alb_set_slave_mac_addr(slave, bond->dev->dev_addr, | |
1126 | bond->alb_info.rlb_enabled); | |
1da177e4 LT |
1127 | } |
1128 | ||
1129 | /* The slave's address is equal to the address of the bond. | |
1130 | * Search for a spare address in the bond for this slave. | |
1131 | */ | |
1132 | free_mac_slave = NULL; | |
1133 | ||
1134 | bond_for_each_slave(bond, tmp_slave1, i) { | |
1135 | found = 0; | |
1136 | bond_for_each_slave(bond, tmp_slave2, j) { | |
1137 | if (!memcmp(tmp_slave1->perm_hwaddr, | |
1138 | tmp_slave2->dev->dev_addr, | |
1139 | ETH_ALEN)) { | |
1140 | found = 1; | |
1141 | break; | |
1142 | } | |
1143 | } | |
1144 | ||
1145 | if (!found) { | |
1146 | /* no slave has tmp_slave1's perm addr | |
1147 | * as its curr addr | |
1148 | */ | |
1149 | free_mac_slave = tmp_slave1; | |
1150 | break; | |
1151 | } | |
1152 | ||
1153 | if (!has_bond_addr) { | |
1154 | if (!memcmp(tmp_slave1->dev->dev_addr, | |
1155 | bond->dev->dev_addr, | |
1156 | ETH_ALEN)) { | |
1157 | ||
1158 | has_bond_addr = tmp_slave1; | |
1159 | } | |
1160 | } | |
1161 | } | |
1162 | ||
1163 | if (free_mac_slave) { | |
1164 | alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr, | |
1165 | bond->alb_info.rlb_enabled); | |
1166 | ||
1167 | printk(KERN_WARNING DRV_NAME | |
4e0952c7 | 1168 | ": %s: Warning: the hw address of slave %s is in use by " |
1da177e4 | 1169 | "the bond; giving it the hw address of %s\n", |
4e0952c7 | 1170 | bond->dev->name, slave->dev->name, free_mac_slave->dev->name); |
1da177e4 LT |
1171 | |
1172 | } else if (has_bond_addr) { | |
1173 | printk(KERN_ERR DRV_NAME | |
4e0952c7 | 1174 | ": %s: Error: the hw address of slave %s is in use by the " |
1da177e4 LT |
1175 | "bond; couldn't find a slave with a free hw address to " |
1176 | "give it (this should not have happened)\n", | |
4e0952c7 | 1177 | bond->dev->name, slave->dev->name); |
1da177e4 LT |
1178 | return -EFAULT; |
1179 | } | |
1180 | ||
1181 | return 0; | |
1182 | } | |
1183 | ||
1184 | /** | |
1185 | * alb_set_mac_address | |
1186 | * @bond: | |
1187 | * @addr: | |
1188 | * | |
1189 | * In TLB mode all slaves are configured to the bond's hw address, but set | |
1190 | * their dev_addr field to different addresses (based on their permanent hw | |
1191 | * addresses). | |
1192 | * | |
1193 | * For each slave, this function sets the interface to the new address and then | |
1194 | * changes its dev_addr field to its previous value. | |
1195 | * | |
1196 | * Unwinding assumes bond's mac address has not yet changed. | |
1197 | */ | |
1198 | static int alb_set_mac_address(struct bonding *bond, void *addr) | |
1199 | { | |
1200 | struct sockaddr sa; | |
1201 | struct slave *slave, *stop_at; | |
1202 | char tmp_addr[ETH_ALEN]; | |
1203 | int res; | |
1204 | int i; | |
1205 | ||
1206 | if (bond->alb_info.rlb_enabled) { | |
1207 | return 0; | |
1208 | } | |
1209 | ||
1210 | bond_for_each_slave(bond, slave, i) { | |
1211 | if (slave->dev->set_mac_address == NULL) { | |
1212 | res = -EOPNOTSUPP; | |
1213 | goto unwind; | |
1214 | } | |
1215 | ||
1216 | /* save net_device's current hw address */ | |
1217 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); | |
1218 | ||
1219 | res = dev_set_mac_address(slave->dev, addr); | |
1220 | ||
1221 | /* restore net_device's hw address */ | |
1222 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); | |
1223 | ||
1224 | if (res) { | |
1225 | goto unwind; | |
1226 | } | |
1227 | } | |
1228 | ||
1229 | return 0; | |
1230 | ||
1231 | unwind: | |
1232 | memcpy(sa.sa_data, bond->dev->dev_addr, bond->dev->addr_len); | |
1233 | sa.sa_family = bond->dev->type; | |
1234 | ||
1235 | /* unwind from head to the slave that failed */ | |
1236 | stop_at = slave; | |
1237 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
1238 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); | |
1239 | dev_set_mac_address(slave->dev, &sa); | |
1240 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); | |
1241 | } | |
1242 | ||
1243 | return res; | |
1244 | } | |
1245 | ||
1246 | /************************ exported alb funcions ************************/ | |
1247 | ||
1248 | int bond_alb_initialize(struct bonding *bond, int rlb_enabled) | |
1249 | { | |
1250 | int res; | |
1251 | ||
1252 | res = tlb_initialize(bond); | |
1253 | if (res) { | |
1254 | return res; | |
1255 | } | |
1256 | ||
1257 | if (rlb_enabled) { | |
1258 | bond->alb_info.rlb_enabled = 1; | |
1259 | /* initialize rlb */ | |
1260 | res = rlb_initialize(bond); | |
1261 | if (res) { | |
1262 | tlb_deinitialize(bond); | |
1263 | return res; | |
1264 | } | |
b76850ab MW |
1265 | } else { |
1266 | bond->alb_info.rlb_enabled = 0; | |
1da177e4 LT |
1267 | } |
1268 | ||
1269 | return 0; | |
1270 | } | |
1271 | ||
1272 | void bond_alb_deinitialize(struct bonding *bond) | |
1273 | { | |
1274 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1275 | ||
1276 | tlb_deinitialize(bond); | |
1277 | ||
1278 | if (bond_info->rlb_enabled) { | |
1279 | rlb_deinitialize(bond); | |
1280 | } | |
1281 | } | |
1282 | ||
1283 | int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev) | |
1284 | { | |
1285 | struct bonding *bond = bond_dev->priv; | |
1286 | struct ethhdr *eth_data; | |
1287 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1288 | struct slave *tx_slave = NULL; | |
d3bb52b0 | 1289 | static const __be32 ip_bcast = htonl(0xffffffff); |
1da177e4 LT |
1290 | int hash_size = 0; |
1291 | int do_tx_balance = 1; | |
1292 | u32 hash_index = 0; | |
eddc9ec5 | 1293 | const u8 *hash_start = NULL; |
1da177e4 LT |
1294 | int res = 1; |
1295 | ||
459a98ed | 1296 | skb_reset_mac_header(skb); |
1da177e4 LT |
1297 | eth_data = eth_hdr(skb); |
1298 | ||
1299 | /* make sure that the curr_active_slave and the slaves list do | |
1300 | * not change during tx | |
1301 | */ | |
1302 | read_lock(&bond->lock); | |
1303 | read_lock(&bond->curr_slave_lock); | |
1304 | ||
1305 | if (!BOND_IS_OK(bond)) { | |
1306 | goto out; | |
1307 | } | |
1308 | ||
1309 | switch (ntohs(skb->protocol)) { | |
eddc9ec5 ACM |
1310 | case ETH_P_IP: { |
1311 | const struct iphdr *iph = ip_hdr(skb); | |
1312 | ||
1da177e4 | 1313 | if ((memcmp(eth_data->h_dest, mac_bcast, ETH_ALEN) == 0) || |
eddc9ec5 ACM |
1314 | (iph->daddr == ip_bcast) || |
1315 | (iph->protocol == IPPROTO_IGMP)) { | |
1da177e4 LT |
1316 | do_tx_balance = 0; |
1317 | break; | |
1318 | } | |
eddc9ec5 ACM |
1319 | hash_start = (char *)&(iph->daddr); |
1320 | hash_size = sizeof(iph->daddr); | |
1321 | } | |
1da177e4 LT |
1322 | break; |
1323 | case ETH_P_IPV6: | |
1324 | if (memcmp(eth_data->h_dest, mac_bcast, ETH_ALEN) == 0) { | |
1325 | do_tx_balance = 0; | |
1326 | break; | |
1327 | } | |
1328 | ||
0660e03f ACM |
1329 | hash_start = (char *)&(ipv6_hdr(skb)->daddr); |
1330 | hash_size = sizeof(ipv6_hdr(skb)->daddr); | |
1da177e4 LT |
1331 | break; |
1332 | case ETH_P_IPX: | |
d3bb52b0 | 1333 | if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) { |
1da177e4 LT |
1334 | /* something is wrong with this packet */ |
1335 | do_tx_balance = 0; | |
1336 | break; | |
1337 | } | |
1338 | ||
1339 | if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) { | |
1340 | /* The only protocol worth balancing in | |
1341 | * this family since it has an "ARP" like | |
1342 | * mechanism | |
1343 | */ | |
1344 | do_tx_balance = 0; | |
1345 | break; | |
1346 | } | |
1347 | ||
1348 | hash_start = (char*)eth_data->h_dest; | |
1349 | hash_size = ETH_ALEN; | |
1350 | break; | |
1351 | case ETH_P_ARP: | |
1352 | do_tx_balance = 0; | |
1353 | if (bond_info->rlb_enabled) { | |
1354 | tx_slave = rlb_arp_xmit(skb, bond); | |
1355 | } | |
1356 | break; | |
1357 | default: | |
1358 | do_tx_balance = 0; | |
1359 | break; | |
1360 | } | |
1361 | ||
1362 | if (do_tx_balance) { | |
1363 | hash_index = _simple_hash(hash_start, hash_size); | |
1364 | tx_slave = tlb_choose_channel(bond, hash_index, skb->len); | |
1365 | } | |
1366 | ||
1367 | if (!tx_slave) { | |
1368 | /* unbalanced or unassigned, send through primary */ | |
1369 | tx_slave = bond->curr_active_slave; | |
1370 | bond_info->unbalanced_load += skb->len; | |
1371 | } | |
1372 | ||
1373 | if (tx_slave && SLAVE_IS_OK(tx_slave)) { | |
1374 | if (tx_slave != bond->curr_active_slave) { | |
1375 | memcpy(eth_data->h_source, | |
1376 | tx_slave->dev->dev_addr, | |
1377 | ETH_ALEN); | |
1378 | } | |
1379 | ||
1380 | res = bond_dev_queue_xmit(bond, skb, tx_slave->dev); | |
1381 | } else { | |
1382 | if (tx_slave) { | |
1383 | tlb_clear_slave(bond, tx_slave, 0); | |
1384 | } | |
1385 | } | |
1386 | ||
1387 | out: | |
1388 | if (res) { | |
1389 | /* no suitable interface, frame not sent */ | |
1390 | dev_kfree_skb(skb); | |
1391 | } | |
1392 | read_unlock(&bond->curr_slave_lock); | |
1393 | read_unlock(&bond->lock); | |
1394 | return 0; | |
1395 | } | |
1396 | ||
1b76b316 | 1397 | void bond_alb_monitor(struct work_struct *work) |
1da177e4 | 1398 | { |
1b76b316 JV |
1399 | struct bonding *bond = container_of(work, struct bonding, |
1400 | alb_work.work); | |
1da177e4 LT |
1401 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
1402 | struct slave *slave; | |
1403 | int i; | |
1404 | ||
1405 | read_lock(&bond->lock); | |
1406 | ||
1407 | if (bond->kill_timers) { | |
1408 | goto out; | |
1409 | } | |
1410 | ||
1411 | if (bond->slave_cnt == 0) { | |
1412 | bond_info->tx_rebalance_counter = 0; | |
1413 | bond_info->lp_counter = 0; | |
1414 | goto re_arm; | |
1415 | } | |
1416 | ||
1417 | bond_info->tx_rebalance_counter++; | |
1418 | bond_info->lp_counter++; | |
1419 | ||
1420 | /* send learning packets */ | |
1421 | if (bond_info->lp_counter >= BOND_ALB_LP_TICKS) { | |
1422 | /* change of curr_active_slave involves swapping of mac addresses. | |
1423 | * in order to avoid this swapping from happening while | |
1424 | * sending the learning packets, the curr_slave_lock must be held for | |
1425 | * read. | |
1426 | */ | |
1427 | read_lock(&bond->curr_slave_lock); | |
1428 | ||
1429 | bond_for_each_slave(bond, slave, i) { | |
e944ef79 | 1430 | alb_send_learning_packets(slave, slave->dev->dev_addr); |
1da177e4 LT |
1431 | } |
1432 | ||
1433 | read_unlock(&bond->curr_slave_lock); | |
1434 | ||
1435 | bond_info->lp_counter = 0; | |
1436 | } | |
1437 | ||
1438 | /* rebalance tx traffic */ | |
1439 | if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) { | |
1440 | ||
1441 | read_lock(&bond->curr_slave_lock); | |
1442 | ||
1443 | bond_for_each_slave(bond, slave, i) { | |
1444 | tlb_clear_slave(bond, slave, 1); | |
1445 | if (slave == bond->curr_active_slave) { | |
1446 | SLAVE_TLB_INFO(slave).load = | |
1447 | bond_info->unbalanced_load / | |
1448 | BOND_TLB_REBALANCE_INTERVAL; | |
1449 | bond_info->unbalanced_load = 0; | |
1450 | } | |
1451 | } | |
1452 | ||
1453 | read_unlock(&bond->curr_slave_lock); | |
1454 | ||
1455 | bond_info->tx_rebalance_counter = 0; | |
1456 | } | |
1457 | ||
1458 | /* handle rlb stuff */ | |
1459 | if (bond_info->rlb_enabled) { | |
1da177e4 LT |
1460 | if (bond_info->primary_is_promisc && |
1461 | (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) { | |
1462 | ||
d0e81b7e JV |
1463 | /* |
1464 | * dev_set_promiscuity requires rtnl and | |
1465 | * nothing else. | |
1466 | */ | |
1467 | read_unlock(&bond->lock); | |
1468 | rtnl_lock(); | |
1469 | ||
1da177e4 LT |
1470 | bond_info->rlb_promisc_timeout_counter = 0; |
1471 | ||
1472 | /* If the primary was set to promiscuous mode | |
1473 | * because a slave was disabled then | |
1474 | * it can now leave promiscuous mode. | |
1475 | */ | |
1476 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); | |
1477 | bond_info->primary_is_promisc = 0; | |
1da177e4 | 1478 | |
d0e81b7e JV |
1479 | rtnl_unlock(); |
1480 | read_lock(&bond->lock); | |
1481 | } | |
1da177e4 LT |
1482 | |
1483 | if (bond_info->rlb_rebalance) { | |
1484 | bond_info->rlb_rebalance = 0; | |
1485 | rlb_rebalance(bond); | |
1486 | } | |
1487 | ||
1488 | /* check if clients need updating */ | |
1489 | if (bond_info->rx_ntt) { | |
1490 | if (bond_info->rlb_update_delay_counter) { | |
1491 | --bond_info->rlb_update_delay_counter; | |
1492 | } else { | |
1493 | rlb_update_rx_clients(bond); | |
1494 | if (bond_info->rlb_update_retry_counter) { | |
1495 | --bond_info->rlb_update_retry_counter; | |
1496 | } else { | |
1497 | bond_info->rx_ntt = 0; | |
1498 | } | |
1499 | } | |
1500 | } | |
1501 | } | |
1502 | ||
1503 | re_arm: | |
1b76b316 | 1504 | queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks); |
1da177e4 LT |
1505 | out: |
1506 | read_unlock(&bond->lock); | |
1507 | } | |
1508 | ||
1509 | /* assumption: called before the slave is attached to the bond | |
1510 | * and not locked by the bond lock | |
1511 | */ | |
1512 | int bond_alb_init_slave(struct bonding *bond, struct slave *slave) | |
1513 | { | |
1514 | int res; | |
1515 | ||
1516 | res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr, | |
1517 | bond->alb_info.rlb_enabled); | |
1518 | if (res) { | |
1519 | return res; | |
1520 | } | |
1521 | ||
1522 | /* caller must hold the bond lock for write since the mac addresses | |
1523 | * are compared and may be swapped. | |
1524 | */ | |
6603a6f2 | 1525 | read_lock(&bond->lock); |
1da177e4 LT |
1526 | |
1527 | res = alb_handle_addr_collision_on_attach(bond, slave); | |
1528 | ||
6603a6f2 | 1529 | read_unlock(&bond->lock); |
1da177e4 LT |
1530 | |
1531 | if (res) { | |
1532 | return res; | |
1533 | } | |
1534 | ||
1535 | tlb_init_slave(slave); | |
1536 | ||
1537 | /* order a rebalance ASAP */ | |
1538 | bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; | |
1539 | ||
1540 | if (bond->alb_info.rlb_enabled) { | |
1541 | bond->alb_info.rlb_rebalance = 1; | |
1542 | } | |
1543 | ||
1544 | return 0; | |
1545 | } | |
1546 | ||
2543331d JV |
1547 | /* |
1548 | * Remove slave from tlb and rlb hash tables, and fix up MAC addresses | |
1549 | * if necessary. | |
1550 | * | |
1551 | * Caller must hold RTNL and no other locks | |
1552 | */ | |
1da177e4 LT |
1553 | void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave) |
1554 | { | |
1555 | if (bond->slave_cnt > 1) { | |
1556 | alb_change_hw_addr_on_detach(bond, slave); | |
1557 | } | |
1558 | ||
1559 | tlb_clear_slave(bond, slave, 0); | |
1560 | ||
1561 | if (bond->alb_info.rlb_enabled) { | |
1562 | bond->alb_info.next_rx_slave = NULL; | |
1563 | rlb_clear_slave(bond, slave); | |
1564 | } | |
1565 | } | |
1566 | ||
1567 | /* Caller must hold bond lock for read */ | |
1568 | void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link) | |
1569 | { | |
1570 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1571 | ||
1572 | if (link == BOND_LINK_DOWN) { | |
1573 | tlb_clear_slave(bond, slave, 0); | |
1574 | if (bond->alb_info.rlb_enabled) { | |
1575 | rlb_clear_slave(bond, slave); | |
1576 | } | |
1577 | } else if (link == BOND_LINK_UP) { | |
1578 | /* order a rebalance ASAP */ | |
1579 | bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; | |
1580 | if (bond->alb_info.rlb_enabled) { | |
1581 | bond->alb_info.rlb_rebalance = 1; | |
1582 | /* If the updelay module parameter is smaller than the | |
1583 | * forwarding delay of the switch the rebalance will | |
1584 | * not work because the rebalance arp replies will | |
1585 | * not be forwarded to the clients.. | |
1586 | */ | |
1587 | } | |
1588 | } | |
1589 | } | |
1590 | ||
1591 | /** | |
1592 | * bond_alb_handle_active_change - assign new curr_active_slave | |
1593 | * @bond: our bonding struct | |
1594 | * @new_slave: new slave to assign | |
1595 | * | |
1596 | * Set the bond->curr_active_slave to @new_slave and handle | |
1597 | * mac address swapping and promiscuity changes as needed. | |
1598 | * | |
059fe7a5 JV |
1599 | * If new_slave is NULL, caller must hold curr_slave_lock or |
1600 | * bond->lock for write. | |
1601 | * | |
1602 | * If new_slave is not NULL, caller must hold RTNL, bond->lock for | |
1603 | * read and curr_slave_lock for write. Processing here may sleep, so | |
1604 | * no other locks may be held. | |
1da177e4 LT |
1605 | */ |
1606 | void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave) | |
1607 | { | |
1608 | struct slave *swap_slave; | |
1609 | int i; | |
1610 | ||
1611 | if (bond->curr_active_slave == new_slave) { | |
1612 | return; | |
1613 | } | |
1614 | ||
1615 | if (bond->curr_active_slave && bond->alb_info.primary_is_promisc) { | |
1616 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); | |
1617 | bond->alb_info.primary_is_promisc = 0; | |
1618 | bond->alb_info.rlb_promisc_timeout_counter = 0; | |
1619 | } | |
1620 | ||
1621 | swap_slave = bond->curr_active_slave; | |
1622 | bond->curr_active_slave = new_slave; | |
1623 | ||
1624 | if (!new_slave || (bond->slave_cnt == 0)) { | |
1625 | return; | |
1626 | } | |
1627 | ||
1628 | /* set the new curr_active_slave to the bonds mac address | |
1629 | * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave | |
1630 | */ | |
1631 | if (!swap_slave) { | |
1632 | struct slave *tmp_slave; | |
1633 | /* find slave that is holding the bond's mac address */ | |
1634 | bond_for_each_slave(bond, tmp_slave, i) { | |
1635 | if (!memcmp(tmp_slave->dev->dev_addr, | |
1636 | bond->dev->dev_addr, ETH_ALEN)) { | |
1637 | swap_slave = tmp_slave; | |
1638 | break; | |
1639 | } | |
1640 | } | |
1641 | } | |
1642 | ||
059fe7a5 JV |
1643 | /* |
1644 | * Arrange for swap_slave and new_slave to temporarily be | |
1645 | * ignored so we can mess with their MAC addresses without | |
1646 | * fear of interference from transmit activity. | |
1647 | */ | |
1648 | if (swap_slave) { | |
1649 | tlb_clear_slave(bond, swap_slave, 1); | |
1650 | } | |
1651 | tlb_clear_slave(bond, new_slave, 1); | |
1652 | ||
1653 | write_unlock_bh(&bond->curr_slave_lock); | |
1654 | read_unlock(&bond->lock); | |
1655 | ||
e0138a66 JV |
1656 | ASSERT_RTNL(); |
1657 | ||
1da177e4 LT |
1658 | /* curr_active_slave must be set before calling alb_swap_mac_addr */ |
1659 | if (swap_slave) { | |
1660 | /* swap mac address */ | |
1661 | alb_swap_mac_addr(bond, swap_slave, new_slave); | |
1662 | } else { | |
1663 | /* set the new_slave to the bond mac address */ | |
1664 | alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr, | |
1665 | bond->alb_info.rlb_enabled); | |
059fe7a5 JV |
1666 | } |
1667 | ||
059fe7a5 JV |
1668 | if (swap_slave) { |
1669 | alb_fasten_mac_swap(bond, swap_slave, new_slave); | |
2543331d | 1670 | read_lock(&bond->lock); |
059fe7a5 | 1671 | } else { |
2543331d | 1672 | read_lock(&bond->lock); |
1da177e4 LT |
1673 | alb_send_learning_packets(new_slave, bond->dev->dev_addr); |
1674 | } | |
059fe7a5 JV |
1675 | |
1676 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 LT |
1677 | } |
1678 | ||
059fe7a5 JV |
1679 | /* |
1680 | * Called with RTNL | |
1681 | */ | |
1da177e4 LT |
1682 | int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr) |
1683 | { | |
1684 | struct bonding *bond = bond_dev->priv; | |
1685 | struct sockaddr *sa = addr; | |
1686 | struct slave *slave, *swap_slave; | |
1687 | int res; | |
1688 | int i; | |
1689 | ||
1690 | if (!is_valid_ether_addr(sa->sa_data)) { | |
1691 | return -EADDRNOTAVAIL; | |
1692 | } | |
1693 | ||
1694 | res = alb_set_mac_address(bond, addr); | |
1695 | if (res) { | |
1696 | return res; | |
1697 | } | |
1698 | ||
1699 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
1700 | ||
1701 | /* If there is no curr_active_slave there is nothing else to do. | |
1702 | * Otherwise we'll need to pass the new address to it and handle | |
1703 | * duplications. | |
1704 | */ | |
1705 | if (!bond->curr_active_slave) { | |
1706 | return 0; | |
1707 | } | |
1708 | ||
1709 | swap_slave = NULL; | |
1710 | ||
1711 | bond_for_each_slave(bond, slave, i) { | |
1712 | if (!memcmp(slave->dev->dev_addr, bond_dev->dev_addr, ETH_ALEN)) { | |
1713 | swap_slave = slave; | |
1714 | break; | |
1715 | } | |
1716 | } | |
1717 | ||
059fe7a5 JV |
1718 | write_unlock_bh(&bond->curr_slave_lock); |
1719 | read_unlock(&bond->lock); | |
1720 | ||
1da177e4 LT |
1721 | if (swap_slave) { |
1722 | alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave); | |
059fe7a5 | 1723 | alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave); |
1da177e4 LT |
1724 | } else { |
1725 | alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr, | |
1726 | bond->alb_info.rlb_enabled); | |
1727 | ||
1728 | alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr); | |
1729 | if (bond->alb_info.rlb_enabled) { | |
1730 | /* inform clients mac address has changed */ | |
1731 | rlb_req_update_slave_clients(bond, bond->curr_active_slave); | |
1732 | } | |
1733 | } | |
1734 | ||
059fe7a5 JV |
1735 | read_lock(&bond->lock); |
1736 | write_lock_bh(&bond->curr_slave_lock); | |
1737 | ||
1da177e4 LT |
1738 | return 0; |
1739 | } | |
1740 | ||
1741 | void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id) | |
1742 | { | |
1743 | if (bond->alb_info.current_alb_vlan && | |
1744 | (bond->alb_info.current_alb_vlan->vlan_id == vlan_id)) { | |
1745 | bond->alb_info.current_alb_vlan = NULL; | |
1746 | } | |
1747 | ||
1748 | if (bond->alb_info.rlb_enabled) { | |
1749 | rlb_clear_vlan(bond, vlan_id); | |
1750 | } | |
1751 | } | |
1752 |