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 | ||
a4aee5c8 JP |
23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
24 | ||
1da177e4 LT |
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> | |
2d1ea19d | 41 | #include <net/ipv6.h> |
1da177e4 LT |
42 | #include <asm/byteorder.h> |
43 | #include "bonding.h" | |
44 | #include "bond_alb.h" | |
45 | ||
46 | ||
1da177e4 | 47 | |
885a136c ED |
48 | #ifndef __long_aligned |
49 | #define __long_aligned __attribute__((aligned((sizeof(long))))) | |
50 | #endif | |
51 | static const u8 mac_bcast[ETH_ALEN] __long_aligned = { | |
52 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff | |
53 | }; | |
54 | static const u8 mac_v6_allmcast[ETH_ALEN] __long_aligned = { | |
55 | 0x33, 0x33, 0x00, 0x00, 0x00, 0x01 | |
56 | }; | |
1da177e4 LT |
57 | static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC; |
58 | ||
59 | #pragma pack(1) | |
60 | struct learning_pkt { | |
61 | u8 mac_dst[ETH_ALEN]; | |
62 | u8 mac_src[ETH_ALEN]; | |
d3bb52b0 | 63 | __be16 type; |
1da177e4 LT |
64 | u8 padding[ETH_ZLEN - ETH_HLEN]; |
65 | }; | |
66 | ||
67 | struct arp_pkt { | |
d3bb52b0 AV |
68 | __be16 hw_addr_space; |
69 | __be16 prot_addr_space; | |
1da177e4 LT |
70 | u8 hw_addr_len; |
71 | u8 prot_addr_len; | |
d3bb52b0 | 72 | __be16 op_code; |
1da177e4 | 73 | u8 mac_src[ETH_ALEN]; /* sender hardware address */ |
d3bb52b0 | 74 | __be32 ip_src; /* sender IP address */ |
1da177e4 | 75 | u8 mac_dst[ETH_ALEN]; /* target hardware address */ |
d3bb52b0 | 76 | __be32 ip_dst; /* target IP address */ |
1da177e4 LT |
77 | }; |
78 | #pragma pack() | |
79 | ||
a16aeb36 ACM |
80 | static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb) |
81 | { | |
d56f90a7 | 82 | return (struct arp_pkt *)skb_network_header(skb); |
a16aeb36 ACM |
83 | } |
84 | ||
1da177e4 LT |
85 | /* Forward declaration */ |
86 | static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]); | |
87 | ||
eddc9ec5 | 88 | static inline u8 _simple_hash(const u8 *hash_start, int hash_size) |
1da177e4 LT |
89 | { |
90 | int i; | |
91 | u8 hash = 0; | |
92 | ||
93 | for (i = 0; i < hash_size; i++) { | |
94 | hash ^= hash_start[i]; | |
95 | } | |
96 | ||
97 | return hash; | |
98 | } | |
99 | ||
100 | /*********************** tlb specific functions ***************************/ | |
101 | ||
102 | static inline void _lock_tx_hashtbl(struct bonding *bond) | |
103 | { | |
6603a6f2 | 104 | spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); |
1da177e4 LT |
105 | } |
106 | ||
107 | static inline void _unlock_tx_hashtbl(struct bonding *bond) | |
108 | { | |
6603a6f2 | 109 | spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); |
1da177e4 LT |
110 | } |
111 | ||
112 | /* Caller must hold tx_hashtbl lock */ | |
113 | static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load) | |
114 | { | |
115 | if (save_load) { | |
116 | entry->load_history = 1 + entry->tx_bytes / | |
117 | BOND_TLB_REBALANCE_INTERVAL; | |
118 | entry->tx_bytes = 0; | |
119 | } | |
120 | ||
121 | entry->tx_slave = NULL; | |
122 | entry->next = TLB_NULL_INDEX; | |
123 | entry->prev = TLB_NULL_INDEX; | |
124 | } | |
125 | ||
126 | static inline void tlb_init_slave(struct slave *slave) | |
127 | { | |
128 | SLAVE_TLB_INFO(slave).load = 0; | |
129 | SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX; | |
130 | } | |
131 | ||
132 | /* Caller must hold bond lock for read */ | |
133 | static void tlb_clear_slave(struct bonding *bond, struct slave *slave, int save_load) | |
134 | { | |
135 | struct tlb_client_info *tx_hash_table; | |
136 | u32 index; | |
137 | ||
138 | _lock_tx_hashtbl(bond); | |
139 | ||
140 | /* clear slave from tx_hashtbl */ | |
141 | tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl; | |
142 | ||
ce39a800 AG |
143 | /* skip this if we've already freed the tx hash table */ |
144 | if (tx_hash_table) { | |
145 | index = SLAVE_TLB_INFO(slave).head; | |
146 | while (index != TLB_NULL_INDEX) { | |
147 | u32 next_index = tx_hash_table[index].next; | |
148 | tlb_init_table_entry(&tx_hash_table[index], save_load); | |
149 | index = next_index; | |
150 | } | |
1da177e4 LT |
151 | } |
152 | ||
1da177e4 | 153 | tlb_init_slave(slave); |
5af47b2f JV |
154 | |
155 | _unlock_tx_hashtbl(bond); | |
1da177e4 LT |
156 | } |
157 | ||
158 | /* Must be called before starting the monitor timer */ | |
159 | static int tlb_initialize(struct bonding *bond) | |
160 | { | |
161 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
162 | int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info); | |
0d206a3a | 163 | struct tlb_client_info *new_hashtbl; |
1da177e4 LT |
164 | int i; |
165 | ||
243cb4e5 | 166 | new_hashtbl = kzalloc(size, GFP_KERNEL); |
0d206a3a | 167 | if (!new_hashtbl) { |
a4aee5c8 | 168 | pr_err("%s: Error: Failed to allocate TLB hash table\n", |
1da177e4 | 169 | bond->dev->name); |
1da177e4 LT |
170 | return -1; |
171 | } | |
0d206a3a MW |
172 | _lock_tx_hashtbl(bond); |
173 | ||
174 | bond_info->tx_hashtbl = new_hashtbl; | |
1da177e4 | 175 | |
1da177e4 | 176 | for (i = 0; i < TLB_HASH_TABLE_SIZE; i++) { |
38dbaf0a | 177 | tlb_init_table_entry(&bond_info->tx_hashtbl[i], 0); |
1da177e4 LT |
178 | } |
179 | ||
180 | _unlock_tx_hashtbl(bond); | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
185 | /* Must be called only after all slaves have been released */ | |
186 | static void tlb_deinitialize(struct bonding *bond) | |
187 | { | |
188 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
189 | ||
190 | _lock_tx_hashtbl(bond); | |
191 | ||
192 | kfree(bond_info->tx_hashtbl); | |
193 | bond_info->tx_hashtbl = NULL; | |
194 | ||
195 | _unlock_tx_hashtbl(bond); | |
196 | } | |
197 | ||
097811bb JP |
198 | static long long compute_gap(struct slave *slave) |
199 | { | |
200 | return (s64) (slave->speed << 20) - /* Convert to Megabit per sec */ | |
201 | (s64) (SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */ | |
202 | } | |
203 | ||
1da177e4 LT |
204 | /* Caller must hold bond lock for read */ |
205 | static struct slave *tlb_get_least_loaded_slave(struct bonding *bond) | |
206 | { | |
207 | struct slave *slave, *least_loaded; | |
097811bb JP |
208 | long long max_gap; |
209 | int i; | |
1da177e4 | 210 | |
097811bb JP |
211 | least_loaded = NULL; |
212 | max_gap = LLONG_MIN; | |
1da177e4 LT |
213 | |
214 | /* Find the slave with the largest gap */ | |
097811bb | 215 | bond_for_each_slave(bond, slave, i) { |
1da177e4 | 216 | if (SLAVE_IS_OK(slave)) { |
097811bb JP |
217 | long long gap = compute_gap(slave); |
218 | ||
1da177e4 LT |
219 | if (max_gap < gap) { |
220 | least_loaded = slave; | |
221 | max_gap = gap; | |
222 | } | |
223 | } | |
224 | } | |
225 | ||
226 | return least_loaded; | |
227 | } | |
228 | ||
229 | /* Caller must hold bond lock for read */ | |
230 | static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u32 skb_len) | |
231 | { | |
232 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
233 | struct tlb_client_info *hash_table; | |
234 | struct slave *assigned_slave; | |
235 | ||
236 | _lock_tx_hashtbl(bond); | |
237 | ||
238 | hash_table = bond_info->tx_hashtbl; | |
239 | assigned_slave = hash_table[hash_index].tx_slave; | |
240 | if (!assigned_slave) { | |
241 | assigned_slave = tlb_get_least_loaded_slave(bond); | |
242 | ||
243 | if (assigned_slave) { | |
244 | struct tlb_slave_info *slave_info = | |
245 | &(SLAVE_TLB_INFO(assigned_slave)); | |
246 | u32 next_index = slave_info->head; | |
247 | ||
248 | hash_table[hash_index].tx_slave = assigned_slave; | |
249 | hash_table[hash_index].next = next_index; | |
250 | hash_table[hash_index].prev = TLB_NULL_INDEX; | |
251 | ||
252 | if (next_index != TLB_NULL_INDEX) { | |
253 | hash_table[next_index].prev = hash_index; | |
254 | } | |
255 | ||
256 | slave_info->head = hash_index; | |
257 | slave_info->load += | |
258 | hash_table[hash_index].load_history; | |
259 | } | |
260 | } | |
261 | ||
262 | if (assigned_slave) { | |
263 | hash_table[hash_index].tx_bytes += skb_len; | |
264 | } | |
265 | ||
266 | _unlock_tx_hashtbl(bond); | |
267 | ||
268 | return assigned_slave; | |
269 | } | |
270 | ||
271 | /*********************** rlb specific functions ***************************/ | |
272 | static inline void _lock_rx_hashtbl(struct bonding *bond) | |
273 | { | |
6603a6f2 | 274 | spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
1da177e4 LT |
275 | } |
276 | ||
277 | static inline void _unlock_rx_hashtbl(struct bonding *bond) | |
278 | { | |
6603a6f2 | 279 | spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
1da177e4 LT |
280 | } |
281 | ||
282 | /* when an ARP REPLY is received from a client update its info | |
283 | * in the rx_hashtbl | |
284 | */ | |
285 | static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp) | |
286 | { | |
287 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
288 | struct rlb_client_info *client_info; | |
289 | u32 hash_index; | |
290 | ||
291 | _lock_rx_hashtbl(bond); | |
292 | ||
293 | hash_index = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src)); | |
294 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
295 | ||
296 | if ((client_info->assigned) && | |
297 | (client_info->ip_src == arp->ip_dst) && | |
42d782ac FL |
298 | (client_info->ip_dst == arp->ip_src) && |
299 | (compare_ether_addr_64bits(client_info->mac_dst, arp->mac_src))) { | |
1da177e4 LT |
300 | /* update the clients MAC address */ |
301 | memcpy(client_info->mac_dst, arp->mac_src, ETH_ALEN); | |
302 | client_info->ntt = 1; | |
303 | bond_info->rx_ntt = 1; | |
304 | } | |
305 | ||
306 | _unlock_rx_hashtbl(bond); | |
307 | } | |
308 | ||
3aba891d JP |
309 | static void rlb_arp_recv(struct sk_buff *skb, struct bonding *bond, |
310 | struct slave *slave) | |
1da177e4 | 311 | { |
3aba891d | 312 | struct arp_pkt *arp; |
1da177e4 | 313 | |
3aba891d JP |
314 | if (skb->protocol != cpu_to_be16(ETH_P_ARP)) |
315 | return; | |
1da177e4 | 316 | |
3aba891d | 317 | arp = (struct arp_pkt *) skb->data; |
1da177e4 | 318 | if (!arp) { |
5a03cdb7 | 319 | pr_debug("Packet has no ARP data\n"); |
3aba891d | 320 | return; |
1da177e4 LT |
321 | } |
322 | ||
3aba891d JP |
323 | if (!pskb_may_pull(skb, arp_hdr_len(bond->dev))) |
324 | return; | |
ab12811c | 325 | |
1da177e4 | 326 | if (skb->len < sizeof(struct arp_pkt)) { |
5a03cdb7 | 327 | pr_debug("Packet is too small to be an ARP\n"); |
3aba891d | 328 | return; |
1da177e4 LT |
329 | } |
330 | ||
331 | if (arp->op_code == htons(ARPOP_REPLY)) { | |
332 | /* update rx hash table for this ARP */ | |
333 | rlb_update_entry_from_arp(bond, arp); | |
5a03cdb7 | 334 | pr_debug("Server received an ARP Reply from client\n"); |
1da177e4 | 335 | } |
1da177e4 LT |
336 | } |
337 | ||
338 | /* Caller must hold bond lock for read */ | |
339 | static struct slave *rlb_next_rx_slave(struct bonding *bond) | |
340 | { | |
341 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
342 | struct slave *rx_slave, *slave, *start_at; | |
343 | int i = 0; | |
344 | ||
345 | if (bond_info->next_rx_slave) { | |
346 | start_at = bond_info->next_rx_slave; | |
347 | } else { | |
348 | start_at = bond->first_slave; | |
349 | } | |
350 | ||
351 | rx_slave = NULL; | |
352 | ||
353 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
354 | if (SLAVE_IS_OK(slave)) { | |
355 | if (!rx_slave) { | |
356 | rx_slave = slave; | |
357 | } else if (slave->speed > rx_slave->speed) { | |
358 | rx_slave = slave; | |
359 | } | |
360 | } | |
361 | } | |
362 | ||
363 | if (rx_slave) { | |
364 | bond_info->next_rx_slave = rx_slave->next; | |
365 | } | |
366 | ||
367 | return rx_slave; | |
368 | } | |
369 | ||
370 | /* teach the switch the mac of a disabled slave | |
371 | * on the primary for fault tolerance | |
372 | * | |
373 | * Caller must hold bond->curr_slave_lock for write or bond lock for write | |
374 | */ | |
375 | static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[]) | |
376 | { | |
377 | if (!bond->curr_active_slave) { | |
378 | return; | |
379 | } | |
380 | ||
381 | if (!bond->alb_info.primary_is_promisc) { | |
7e1a1ac1 WC |
382 | if (!dev_set_promiscuity(bond->curr_active_slave->dev, 1)) |
383 | bond->alb_info.primary_is_promisc = 1; | |
384 | else | |
385 | bond->alb_info.primary_is_promisc = 0; | |
1da177e4 LT |
386 | } |
387 | ||
388 | bond->alb_info.rlb_promisc_timeout_counter = 0; | |
389 | ||
390 | alb_send_learning_packets(bond->curr_active_slave, addr); | |
391 | } | |
392 | ||
393 | /* slave being removed should not be active at this point | |
394 | * | |
395 | * Caller must hold bond lock for read | |
396 | */ | |
397 | static void rlb_clear_slave(struct bonding *bond, struct slave *slave) | |
398 | { | |
399 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
400 | struct rlb_client_info *rx_hash_table; | |
401 | u32 index, next_index; | |
402 | ||
403 | /* clear slave from rx_hashtbl */ | |
404 | _lock_rx_hashtbl(bond); | |
405 | ||
406 | rx_hash_table = bond_info->rx_hashtbl; | |
407 | index = bond_info->rx_hashtbl_head; | |
408 | for (; index != RLB_NULL_INDEX; index = next_index) { | |
409 | next_index = rx_hash_table[index].next; | |
410 | if (rx_hash_table[index].slave == slave) { | |
411 | struct slave *assigned_slave = rlb_next_rx_slave(bond); | |
412 | ||
413 | if (assigned_slave) { | |
414 | rx_hash_table[index].slave = assigned_slave; | |
885a136c ED |
415 | if (compare_ether_addr_64bits(rx_hash_table[index].mac_dst, |
416 | mac_bcast)) { | |
1da177e4 LT |
417 | bond_info->rx_hashtbl[index].ntt = 1; |
418 | bond_info->rx_ntt = 1; | |
419 | /* A slave has been removed from the | |
420 | * table because it is either disabled | |
421 | * or being released. We must retry the | |
422 | * update to avoid clients from not | |
423 | * being updated & disconnecting when | |
424 | * there is stress | |
425 | */ | |
426 | bond_info->rlb_update_retry_counter = | |
427 | RLB_UPDATE_RETRY; | |
428 | } | |
429 | } else { /* there is no active slave */ | |
430 | rx_hash_table[index].slave = NULL; | |
431 | } | |
432 | } | |
433 | } | |
434 | ||
435 | _unlock_rx_hashtbl(bond); | |
436 | ||
6603a6f2 | 437 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
438 | |
439 | if (slave != bond->curr_active_slave) { | |
440 | rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr); | |
441 | } | |
442 | ||
6603a6f2 | 443 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
444 | } |
445 | ||
446 | static void rlb_update_client(struct rlb_client_info *client_info) | |
447 | { | |
448 | int i; | |
449 | ||
450 | if (!client_info->slave) { | |
451 | return; | |
452 | } | |
453 | ||
454 | for (i = 0; i < RLB_ARP_BURST_SIZE; i++) { | |
455 | struct sk_buff *skb; | |
456 | ||
457 | skb = arp_create(ARPOP_REPLY, ETH_P_ARP, | |
458 | client_info->ip_dst, | |
459 | client_info->slave->dev, | |
460 | client_info->ip_src, | |
461 | client_info->mac_dst, | |
462 | client_info->slave->dev->dev_addr, | |
463 | client_info->mac_dst); | |
464 | if (!skb) { | |
a4aee5c8 | 465 | pr_err("%s: Error: failed to create an ARP packet\n", |
4e0952c7 | 466 | client_info->slave->dev->master->name); |
1da177e4 LT |
467 | continue; |
468 | } | |
469 | ||
470 | skb->dev = client_info->slave->dev; | |
471 | ||
472 | if (client_info->tag) { | |
473 | skb = vlan_put_tag(skb, client_info->vlan_id); | |
474 | if (!skb) { | |
a4aee5c8 | 475 | pr_err("%s: Error: failed to insert VLAN tag\n", |
4e0952c7 | 476 | client_info->slave->dev->master->name); |
1da177e4 LT |
477 | continue; |
478 | } | |
479 | } | |
480 | ||
481 | arp_xmit(skb); | |
482 | } | |
483 | } | |
484 | ||
485 | /* sends ARP REPLIES that update the clients that need updating */ | |
486 | static void rlb_update_rx_clients(struct bonding *bond) | |
487 | { | |
488 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
489 | struct rlb_client_info *client_info; | |
490 | u32 hash_index; | |
491 | ||
492 | _lock_rx_hashtbl(bond); | |
493 | ||
494 | hash_index = bond_info->rx_hashtbl_head; | |
495 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
496 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
497 | if (client_info->ntt) { | |
498 | rlb_update_client(client_info); | |
499 | if (bond_info->rlb_update_retry_counter == 0) { | |
500 | client_info->ntt = 0; | |
501 | } | |
502 | } | |
503 | } | |
504 | ||
94e2bd68 | 505 | /* do not update the entries again until this counter is zero so that |
1da177e4 LT |
506 | * not to confuse the clients. |
507 | */ | |
508 | bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY; | |
509 | ||
510 | _unlock_rx_hashtbl(bond); | |
511 | } | |
512 | ||
513 | /* The slave was assigned a new mac address - update the clients */ | |
514 | static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave) | |
515 | { | |
516 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
517 | struct rlb_client_info *client_info; | |
518 | int ntt = 0; | |
519 | u32 hash_index; | |
520 | ||
521 | _lock_rx_hashtbl(bond); | |
522 | ||
523 | hash_index = bond_info->rx_hashtbl_head; | |
524 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
525 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
526 | ||
527 | if ((client_info->slave == slave) && | |
885a136c | 528 | compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { |
1da177e4 LT |
529 | client_info->ntt = 1; |
530 | ntt = 1; | |
531 | } | |
532 | } | |
533 | ||
534 | // update the team's flag only after the whole iteration | |
535 | if (ntt) { | |
536 | bond_info->rx_ntt = 1; | |
537 | //fasten the change | |
538 | bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY; | |
539 | } | |
540 | ||
541 | _unlock_rx_hashtbl(bond); | |
542 | } | |
543 | ||
544 | /* mark all clients using src_ip to be updated */ | |
d3bb52b0 | 545 | static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip) |
1da177e4 LT |
546 | { |
547 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
548 | struct rlb_client_info *client_info; | |
549 | u32 hash_index; | |
550 | ||
551 | _lock_rx_hashtbl(bond); | |
552 | ||
553 | hash_index = bond_info->rx_hashtbl_head; | |
554 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
555 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
556 | ||
557 | if (!client_info->slave) { | |
a4aee5c8 | 558 | pr_err("%s: Error: found a client with no channel in the client's hash table\n", |
4e0952c7 | 559 | bond->dev->name); |
1da177e4 LT |
560 | continue; |
561 | } | |
562 | /*update all clients using this src_ip, that are not assigned | |
563 | * to the team's address (curr_active_slave) and have a known | |
564 | * unicast mac address. | |
565 | */ | |
566 | if ((client_info->ip_src == src_ip) && | |
885a136c ED |
567 | compare_ether_addr_64bits(client_info->slave->dev->dev_addr, |
568 | bond->dev->dev_addr) && | |
569 | compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { | |
1da177e4 LT |
570 | client_info->ntt = 1; |
571 | bond_info->rx_ntt = 1; | |
572 | } | |
573 | } | |
574 | ||
575 | _unlock_rx_hashtbl(bond); | |
576 | } | |
577 | ||
578 | /* Caller must hold both bond and ptr locks for read */ | |
579 | static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond) | |
580 | { | |
581 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
a16aeb36 | 582 | struct arp_pkt *arp = arp_pkt(skb); |
1da177e4 LT |
583 | struct slave *assigned_slave; |
584 | struct rlb_client_info *client_info; | |
585 | u32 hash_index = 0; | |
586 | ||
587 | _lock_rx_hashtbl(bond); | |
588 | ||
e364a341 | 589 | hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst)); |
1da177e4 LT |
590 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
591 | ||
592 | if (client_info->assigned) { | |
593 | if ((client_info->ip_src == arp->ip_src) && | |
594 | (client_info->ip_dst == arp->ip_dst)) { | |
595 | /* the entry is already assigned to this client */ | |
885a136c | 596 | if (compare_ether_addr_64bits(arp->mac_dst, mac_bcast)) { |
1da177e4 LT |
597 | /* update mac address from arp */ |
598 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); | |
599 | } | |
600 | ||
601 | assigned_slave = client_info->slave; | |
602 | if (assigned_slave) { | |
603 | _unlock_rx_hashtbl(bond); | |
604 | return assigned_slave; | |
605 | } | |
606 | } else { | |
607 | /* the entry is already assigned to some other client, | |
608 | * move the old client to primary (curr_active_slave) so | |
609 | * that the new client can be assigned to this entry. | |
610 | */ | |
611 | if (bond->curr_active_slave && | |
612 | client_info->slave != bond->curr_active_slave) { | |
613 | client_info->slave = bond->curr_active_slave; | |
614 | rlb_update_client(client_info); | |
615 | } | |
616 | } | |
617 | } | |
618 | /* assign a new slave */ | |
619 | assigned_slave = rlb_next_rx_slave(bond); | |
620 | ||
621 | if (assigned_slave) { | |
622 | client_info->ip_src = arp->ip_src; | |
623 | client_info->ip_dst = arp->ip_dst; | |
624 | /* arp->mac_dst is broadcast for arp reqeusts. | |
625 | * will be updated with clients actual unicast mac address | |
626 | * upon receiving an arp reply. | |
627 | */ | |
628 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); | |
629 | client_info->slave = assigned_slave; | |
630 | ||
885a136c | 631 | if (compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { |
1da177e4 LT |
632 | client_info->ntt = 1; |
633 | bond->alb_info.rx_ntt = 1; | |
634 | } else { | |
635 | client_info->ntt = 0; | |
636 | } | |
637 | ||
cc0e4070 | 638 | if (bond_vlan_used(bond)) { |
966bc6f4 | 639 | if (!vlan_get_tag(skb, &client_info->vlan_id)) |
1da177e4 | 640 | client_info->tag = 1; |
1da177e4 LT |
641 | } |
642 | ||
643 | if (!client_info->assigned) { | |
644 | u32 prev_tbl_head = bond_info->rx_hashtbl_head; | |
645 | bond_info->rx_hashtbl_head = hash_index; | |
646 | client_info->next = prev_tbl_head; | |
647 | if (prev_tbl_head != RLB_NULL_INDEX) { | |
648 | bond_info->rx_hashtbl[prev_tbl_head].prev = | |
649 | hash_index; | |
650 | } | |
651 | client_info->assigned = 1; | |
652 | } | |
653 | } | |
654 | ||
655 | _unlock_rx_hashtbl(bond); | |
656 | ||
657 | return assigned_slave; | |
658 | } | |
659 | ||
660 | /* chooses (and returns) transmit channel for arp reply | |
661 | * does not choose channel for other arp types since they are | |
662 | * sent on the curr_active_slave | |
663 | */ | |
664 | static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond) | |
665 | { | |
a16aeb36 | 666 | struct arp_pkt *arp = arp_pkt(skb); |
1da177e4 LT |
667 | struct slave *tx_slave = NULL; |
668 | ||
f14c4e4e | 669 | if (arp->op_code == htons(ARPOP_REPLY)) { |
1da177e4 LT |
670 | /* the arp must be sent on the selected |
671 | * rx channel | |
672 | */ | |
673 | tx_slave = rlb_choose_channel(skb, bond); | |
674 | if (tx_slave) { | |
675 | memcpy(arp->mac_src,tx_slave->dev->dev_addr, ETH_ALEN); | |
676 | } | |
5a03cdb7 | 677 | pr_debug("Server sent ARP Reply packet\n"); |
f14c4e4e | 678 | } else if (arp->op_code == htons(ARPOP_REQUEST)) { |
1da177e4 LT |
679 | /* Create an entry in the rx_hashtbl for this client as a |
680 | * place holder. | |
681 | * When the arp reply is received the entry will be updated | |
682 | * with the correct unicast address of the client. | |
683 | */ | |
684 | rlb_choose_channel(skb, bond); | |
685 | ||
77c8e2c0 | 686 | /* The ARP reply packets must be delayed so that |
1da177e4 LT |
687 | * they can cancel out the influence of the ARP request. |
688 | */ | |
689 | bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY; | |
690 | ||
691 | /* arp requests are broadcast and are sent on the primary | |
692 | * the arp request will collapse all clients on the subnet to | |
693 | * the primary slave. We must register these clients to be | |
694 | * updated with their assigned mac. | |
695 | */ | |
696 | rlb_req_update_subnet_clients(bond, arp->ip_src); | |
5a03cdb7 | 697 | pr_debug("Server sent ARP Request packet\n"); |
1da177e4 LT |
698 | } |
699 | ||
700 | return tx_slave; | |
701 | } | |
702 | ||
703 | /* Caller must hold bond lock for read */ | |
704 | static void rlb_rebalance(struct bonding *bond) | |
705 | { | |
706 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
707 | struct slave *assigned_slave; | |
708 | struct rlb_client_info *client_info; | |
709 | int ntt; | |
710 | u32 hash_index; | |
711 | ||
712 | _lock_rx_hashtbl(bond); | |
713 | ||
714 | ntt = 0; | |
715 | hash_index = bond_info->rx_hashtbl_head; | |
716 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
717 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
718 | assigned_slave = rlb_next_rx_slave(bond); | |
719 | if (assigned_slave && (client_info->slave != assigned_slave)) { | |
720 | client_info->slave = assigned_slave; | |
721 | client_info->ntt = 1; | |
722 | ntt = 1; | |
723 | } | |
724 | } | |
725 | ||
726 | /* update the team's flag only after the whole iteration */ | |
727 | if (ntt) { | |
728 | bond_info->rx_ntt = 1; | |
729 | } | |
730 | _unlock_rx_hashtbl(bond); | |
731 | } | |
732 | ||
733 | /* Caller must hold rx_hashtbl lock */ | |
734 | static void rlb_init_table_entry(struct rlb_client_info *entry) | |
735 | { | |
736 | memset(entry, 0, sizeof(struct rlb_client_info)); | |
737 | entry->next = RLB_NULL_INDEX; | |
738 | entry->prev = RLB_NULL_INDEX; | |
739 | } | |
740 | ||
741 | static int rlb_initialize(struct bonding *bond) | |
742 | { | |
743 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
0d206a3a | 744 | struct rlb_client_info *new_hashtbl; |
1da177e4 LT |
745 | int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info); |
746 | int i; | |
747 | ||
0d206a3a MW |
748 | new_hashtbl = kmalloc(size, GFP_KERNEL); |
749 | if (!new_hashtbl) { | |
a4aee5c8 | 750 | pr_err("%s: Error: Failed to allocate RLB hash table\n", |
1da177e4 | 751 | bond->dev->name); |
1da177e4 LT |
752 | return -1; |
753 | } | |
0d206a3a MW |
754 | _lock_rx_hashtbl(bond); |
755 | ||
756 | bond_info->rx_hashtbl = new_hashtbl; | |
1da177e4 LT |
757 | |
758 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; | |
759 | ||
760 | for (i = 0; i < RLB_HASH_TABLE_SIZE; i++) { | |
761 | rlb_init_table_entry(bond_info->rx_hashtbl + i); | |
762 | } | |
763 | ||
764 | _unlock_rx_hashtbl(bond); | |
765 | ||
1da177e4 | 766 | /* register to receive ARPs */ |
3aba891d | 767 | bond->recv_probe = rlb_arp_recv; |
1da177e4 LT |
768 | |
769 | return 0; | |
770 | } | |
771 | ||
772 | static void rlb_deinitialize(struct bonding *bond) | |
773 | { | |
774 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
775 | ||
1da177e4 LT |
776 | _lock_rx_hashtbl(bond); |
777 | ||
778 | kfree(bond_info->rx_hashtbl); | |
779 | bond_info->rx_hashtbl = NULL; | |
780 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; | |
781 | ||
782 | _unlock_rx_hashtbl(bond); | |
783 | } | |
784 | ||
785 | static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id) | |
786 | { | |
787 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
788 | u32 curr_index; | |
789 | ||
790 | _lock_rx_hashtbl(bond); | |
791 | ||
792 | curr_index = bond_info->rx_hashtbl_head; | |
793 | while (curr_index != RLB_NULL_INDEX) { | |
794 | struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]); | |
795 | u32 next_index = bond_info->rx_hashtbl[curr_index].next; | |
796 | u32 prev_index = bond_info->rx_hashtbl[curr_index].prev; | |
797 | ||
798 | if (curr->tag && (curr->vlan_id == vlan_id)) { | |
799 | if (curr_index == bond_info->rx_hashtbl_head) { | |
800 | bond_info->rx_hashtbl_head = next_index; | |
801 | } | |
802 | if (prev_index != RLB_NULL_INDEX) { | |
803 | bond_info->rx_hashtbl[prev_index].next = next_index; | |
804 | } | |
805 | if (next_index != RLB_NULL_INDEX) { | |
806 | bond_info->rx_hashtbl[next_index].prev = prev_index; | |
807 | } | |
808 | ||
809 | rlb_init_table_entry(curr); | |
810 | } | |
811 | ||
812 | curr_index = next_index; | |
813 | } | |
814 | ||
815 | _unlock_rx_hashtbl(bond); | |
816 | } | |
817 | ||
818 | /*********************** tlb/rlb shared functions *********************/ | |
819 | ||
820 | static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]) | |
821 | { | |
822 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
823 | struct learning_pkt pkt; | |
824 | int size = sizeof(struct learning_pkt); | |
825 | int i; | |
826 | ||
827 | memset(&pkt, 0, size); | |
828 | memcpy(pkt.mac_dst, mac_addr, ETH_ALEN); | |
829 | memcpy(pkt.mac_src, mac_addr, ETH_ALEN); | |
09640e63 | 830 | pkt.type = cpu_to_be16(ETH_P_LOOP); |
1da177e4 LT |
831 | |
832 | for (i = 0; i < MAX_LP_BURST; i++) { | |
833 | struct sk_buff *skb; | |
834 | char *data; | |
835 | ||
836 | skb = dev_alloc_skb(size); | |
837 | if (!skb) { | |
838 | return; | |
839 | } | |
840 | ||
841 | data = skb_put(skb, size); | |
842 | memcpy(data, &pkt, size); | |
843 | ||
459a98ed | 844 | skb_reset_mac_header(skb); |
b0e380b1 | 845 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
846 | skb->protocol = pkt.type; |
847 | skb->priority = TC_PRIO_CONTROL; | |
848 | skb->dev = slave->dev; | |
849 | ||
cc0e4070 | 850 | if (bond_vlan_used(bond)) { |
1da177e4 LT |
851 | struct vlan_entry *vlan; |
852 | ||
853 | vlan = bond_next_vlan(bond, | |
854 | bond->alb_info.current_alb_vlan); | |
855 | ||
856 | bond->alb_info.current_alb_vlan = vlan; | |
857 | if (!vlan) { | |
858 | kfree_skb(skb); | |
859 | continue; | |
860 | } | |
861 | ||
862 | skb = vlan_put_tag(skb, vlan->vlan_id); | |
863 | if (!skb) { | |
a4aee5c8 | 864 | pr_err("%s: Error: failed to insert VLAN tag\n", |
4e0952c7 | 865 | bond->dev->name); |
1da177e4 LT |
866 | continue; |
867 | } | |
868 | } | |
869 | ||
870 | dev_queue_xmit(skb); | |
871 | } | |
872 | } | |
873 | ||
874 | /* hw is a boolean parameter that determines whether we should try and | |
875 | * set the hw address of the device as well as the hw address of the | |
876 | * net_device | |
877 | */ | |
878 | static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[], int hw) | |
879 | { | |
880 | struct net_device *dev = slave->dev; | |
881 | struct sockaddr s_addr; | |
882 | ||
883 | if (!hw) { | |
884 | memcpy(dev->dev_addr, addr, dev->addr_len); | |
885 | return 0; | |
886 | } | |
887 | ||
888 | /* for rlb each slave must have a unique hw mac addresses so that */ | |
889 | /* each slave will receive packets destined to a different mac */ | |
890 | memcpy(s_addr.sa_data, addr, dev->addr_len); | |
891 | s_addr.sa_family = dev->type; | |
892 | if (dev_set_mac_address(dev, &s_addr)) { | |
a4aee5c8 JP |
893 | pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n" |
894 | "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n", | |
4e0952c7 | 895 | dev->master->name, dev->name); |
1da177e4 LT |
896 | return -EOPNOTSUPP; |
897 | } | |
898 | return 0; | |
899 | } | |
900 | ||
059fe7a5 JV |
901 | /* |
902 | * Swap MAC addresses between two slaves. | |
903 | * | |
904 | * Called with RTNL held, and no other locks. | |
905 | * | |
906 | */ | |
907 | ||
1da177e4 LT |
908 | static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct slave *slave2) |
909 | { | |
1da177e4 | 910 | u8 tmp_mac_addr[ETH_ALEN]; |
1da177e4 LT |
911 | |
912 | memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN); | |
913 | alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr, bond->alb_info.rlb_enabled); | |
914 | alb_set_slave_mac_addr(slave2, tmp_mac_addr, bond->alb_info.rlb_enabled); | |
915 | ||
059fe7a5 JV |
916 | } |
917 | ||
918 | /* | |
919 | * Send learning packets after MAC address swap. | |
920 | * | |
2543331d | 921 | * Called with RTNL and no other locks |
059fe7a5 JV |
922 | */ |
923 | static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1, | |
924 | struct slave *slave2) | |
925 | { | |
926 | int slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2)); | |
927 | struct slave *disabled_slave = NULL; | |
928 | ||
2543331d JV |
929 | ASSERT_RTNL(); |
930 | ||
1da177e4 LT |
931 | /* fasten the change in the switch */ |
932 | if (SLAVE_IS_OK(slave1)) { | |
933 | alb_send_learning_packets(slave1, slave1->dev->dev_addr); | |
934 | if (bond->alb_info.rlb_enabled) { | |
935 | /* inform the clients that the mac address | |
936 | * has changed | |
937 | */ | |
938 | rlb_req_update_slave_clients(bond, slave1); | |
939 | } | |
940 | } else { | |
941 | disabled_slave = slave1; | |
942 | } | |
943 | ||
944 | if (SLAVE_IS_OK(slave2)) { | |
945 | alb_send_learning_packets(slave2, slave2->dev->dev_addr); | |
946 | if (bond->alb_info.rlb_enabled) { | |
947 | /* inform the clients that the mac address | |
948 | * has changed | |
949 | */ | |
950 | rlb_req_update_slave_clients(bond, slave2); | |
951 | } | |
952 | } else { | |
953 | disabled_slave = slave2; | |
954 | } | |
955 | ||
956 | if (bond->alb_info.rlb_enabled && slaves_state_differ) { | |
957 | /* A disabled slave was assigned an active mac addr */ | |
958 | rlb_teach_disabled_mac_on_primary(bond, | |
959 | disabled_slave->dev->dev_addr); | |
960 | } | |
961 | } | |
962 | ||
963 | /** | |
964 | * alb_change_hw_addr_on_detach | |
965 | * @bond: bonding we're working on | |
966 | * @slave: the slave that was just detached | |
967 | * | |
968 | * We assume that @slave was already detached from the slave list. | |
969 | * | |
970 | * If @slave's permanent hw address is different both from its current | |
971 | * address and from @bond's address, then somewhere in the bond there's | |
972 | * a slave that has @slave's permanet address as its current address. | |
973 | * We'll make sure that that slave no longer uses @slave's permanent address. | |
974 | * | |
2543331d | 975 | * Caller must hold RTNL and no other locks |
1da177e4 LT |
976 | */ |
977 | static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave) | |
978 | { | |
979 | int perm_curr_diff; | |
980 | int perm_bond_diff; | |
981 | ||
885a136c ED |
982 | perm_curr_diff = compare_ether_addr_64bits(slave->perm_hwaddr, |
983 | slave->dev->dev_addr); | |
984 | perm_bond_diff = compare_ether_addr_64bits(slave->perm_hwaddr, | |
985 | bond->dev->dev_addr); | |
1da177e4 LT |
986 | |
987 | if (perm_curr_diff && perm_bond_diff) { | |
988 | struct slave *tmp_slave; | |
989 | int i, found = 0; | |
990 | ||
991 | bond_for_each_slave(bond, tmp_slave, i) { | |
885a136c ED |
992 | if (!compare_ether_addr_64bits(slave->perm_hwaddr, |
993 | tmp_slave->dev->dev_addr)) { | |
1da177e4 LT |
994 | found = 1; |
995 | break; | |
996 | } | |
997 | } | |
998 | ||
999 | if (found) { | |
059fe7a5 | 1000 | /* locking: needs RTNL and nothing else */ |
1da177e4 | 1001 | alb_swap_mac_addr(bond, slave, tmp_slave); |
059fe7a5 | 1002 | alb_fasten_mac_swap(bond, slave, tmp_slave); |
1da177e4 LT |
1003 | } |
1004 | } | |
1005 | } | |
1006 | ||
1007 | /** | |
1008 | * alb_handle_addr_collision_on_attach | |
1009 | * @bond: bonding we're working on | |
1010 | * @slave: the slave that was just attached | |
1011 | * | |
1012 | * checks uniqueness of slave's mac address and handles the case the | |
1013 | * new slave uses the bonds mac address. | |
1014 | * | |
1015 | * If the permanent hw address of @slave is @bond's hw address, we need to | |
1016 | * find a different hw address to give @slave, that isn't in use by any other | |
77c8e2c0 | 1017 | * slave in the bond. This address must be, of course, one of the permanent |
1da177e4 LT |
1018 | * addresses of the other slaves. |
1019 | * | |
1020 | * We go over the slave list, and for each slave there we compare its | |
1021 | * permanent hw address with the current address of all the other slaves. | |
1022 | * If no match was found, then we've found a slave with a permanent address | |
1023 | * that isn't used by any other slave in the bond, so we can assign it to | |
1024 | * @slave. | |
1025 | * | |
1026 | * assumption: this function is called before @slave is attached to the | |
1027 | * bond slave list. | |
1028 | * | |
1029 | * caller must hold the bond lock for write since the mac addresses are compared | |
1030 | * and may be swapped. | |
1031 | */ | |
1032 | static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave) | |
1033 | { | |
1034 | struct slave *tmp_slave1, *tmp_slave2, *free_mac_slave; | |
1035 | struct slave *has_bond_addr = bond->curr_active_slave; | |
1036 | int i, j, found = 0; | |
1037 | ||
1038 | if (bond->slave_cnt == 0) { | |
1039 | /* this is the first slave */ | |
1040 | return 0; | |
1041 | } | |
1042 | ||
1043 | /* if slave's mac address differs from bond's mac address | |
1044 | * check uniqueness of slave's mac address against the other | |
1045 | * slaves in the bond. | |
1046 | */ | |
885a136c | 1047 | if (compare_ether_addr_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) { |
1da177e4 | 1048 | bond_for_each_slave(bond, tmp_slave1, i) { |
885a136c ED |
1049 | if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr, |
1050 | slave->dev->dev_addr)) { | |
1da177e4 LT |
1051 | found = 1; |
1052 | break; | |
1053 | } | |
1054 | } | |
1055 | ||
6b38aefe JL |
1056 | if (!found) |
1057 | return 0; | |
1da177e4 | 1058 | |
6b38aefe JL |
1059 | /* Try setting slave mac to bond address and fall-through |
1060 | to code handling that situation below... */ | |
1061 | alb_set_slave_mac_addr(slave, bond->dev->dev_addr, | |
1062 | bond->alb_info.rlb_enabled); | |
1da177e4 LT |
1063 | } |
1064 | ||
1065 | /* The slave's address is equal to the address of the bond. | |
1066 | * Search for a spare address in the bond for this slave. | |
1067 | */ | |
1068 | free_mac_slave = NULL; | |
1069 | ||
1070 | bond_for_each_slave(bond, tmp_slave1, i) { | |
1071 | found = 0; | |
1072 | bond_for_each_slave(bond, tmp_slave2, j) { | |
885a136c ED |
1073 | if (!compare_ether_addr_64bits(tmp_slave1->perm_hwaddr, |
1074 | tmp_slave2->dev->dev_addr)) { | |
1da177e4 LT |
1075 | found = 1; |
1076 | break; | |
1077 | } | |
1078 | } | |
1079 | ||
1080 | if (!found) { | |
1081 | /* no slave has tmp_slave1's perm addr | |
1082 | * as its curr addr | |
1083 | */ | |
1084 | free_mac_slave = tmp_slave1; | |
1085 | break; | |
1086 | } | |
1087 | ||
1088 | if (!has_bond_addr) { | |
885a136c ED |
1089 | if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr, |
1090 | bond->dev->dev_addr)) { | |
1da177e4 LT |
1091 | |
1092 | has_bond_addr = tmp_slave1; | |
1093 | } | |
1094 | } | |
1095 | } | |
1096 | ||
1097 | if (free_mac_slave) { | |
1098 | alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr, | |
1099 | bond->alb_info.rlb_enabled); | |
1100 | ||
a4aee5c8 | 1101 | pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n", |
e5e2a8fd JP |
1102 | bond->dev->name, slave->dev->name, |
1103 | free_mac_slave->dev->name); | |
1da177e4 LT |
1104 | |
1105 | } else if (has_bond_addr) { | |
a4aee5c8 | 1106 | pr_err("%s: Error: the hw address of slave %s is in use by the bond; couldn't find a slave with a free hw address to give it (this should not have happened)\n", |
4e0952c7 | 1107 | bond->dev->name, slave->dev->name); |
1da177e4 LT |
1108 | return -EFAULT; |
1109 | } | |
1110 | ||
1111 | return 0; | |
1112 | } | |
1113 | ||
1114 | /** | |
1115 | * alb_set_mac_address | |
1116 | * @bond: | |
1117 | * @addr: | |
1118 | * | |
1119 | * In TLB mode all slaves are configured to the bond's hw address, but set | |
1120 | * their dev_addr field to different addresses (based on their permanent hw | |
1121 | * addresses). | |
1122 | * | |
1123 | * For each slave, this function sets the interface to the new address and then | |
1124 | * changes its dev_addr field to its previous value. | |
1125 | * | |
1126 | * Unwinding assumes bond's mac address has not yet changed. | |
1127 | */ | |
1128 | static int alb_set_mac_address(struct bonding *bond, void *addr) | |
1129 | { | |
1130 | struct sockaddr sa; | |
1131 | struct slave *slave, *stop_at; | |
1132 | char tmp_addr[ETH_ALEN]; | |
1133 | int res; | |
1134 | int i; | |
1135 | ||
1136 | if (bond->alb_info.rlb_enabled) { | |
1137 | return 0; | |
1138 | } | |
1139 | ||
1140 | bond_for_each_slave(bond, slave, i) { | |
1da177e4 LT |
1141 | /* save net_device's current hw address */ |
1142 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); | |
1143 | ||
1144 | res = dev_set_mac_address(slave->dev, addr); | |
1145 | ||
1146 | /* restore net_device's hw address */ | |
1147 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); | |
1148 | ||
eb7cc59a | 1149 | if (res) |
1da177e4 | 1150 | goto unwind; |
1da177e4 LT |
1151 | } |
1152 | ||
1153 | return 0; | |
1154 | ||
1155 | unwind: | |
1156 | memcpy(sa.sa_data, bond->dev->dev_addr, bond->dev->addr_len); | |
1157 | sa.sa_family = bond->dev->type; | |
1158 | ||
1159 | /* unwind from head to the slave that failed */ | |
1160 | stop_at = slave; | |
1161 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
1162 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); | |
1163 | dev_set_mac_address(slave->dev, &sa); | |
1164 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); | |
1165 | } | |
1166 | ||
1167 | return res; | |
1168 | } | |
1169 | ||
1170 | /************************ exported alb funcions ************************/ | |
1171 | ||
1172 | int bond_alb_initialize(struct bonding *bond, int rlb_enabled) | |
1173 | { | |
1174 | int res; | |
1175 | ||
1176 | res = tlb_initialize(bond); | |
1177 | if (res) { | |
1178 | return res; | |
1179 | } | |
1180 | ||
1181 | if (rlb_enabled) { | |
1182 | bond->alb_info.rlb_enabled = 1; | |
1183 | /* initialize rlb */ | |
1184 | res = rlb_initialize(bond); | |
1185 | if (res) { | |
1186 | tlb_deinitialize(bond); | |
1187 | return res; | |
1188 | } | |
b76850ab MW |
1189 | } else { |
1190 | bond->alb_info.rlb_enabled = 0; | |
1da177e4 LT |
1191 | } |
1192 | ||
1193 | return 0; | |
1194 | } | |
1195 | ||
1196 | void bond_alb_deinitialize(struct bonding *bond) | |
1197 | { | |
1198 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1199 | ||
1200 | tlb_deinitialize(bond); | |
1201 | ||
1202 | if (bond_info->rlb_enabled) { | |
1203 | rlb_deinitialize(bond); | |
1204 | } | |
1205 | } | |
1206 | ||
1207 | int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev) | |
1208 | { | |
454d7c9b | 1209 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1210 | struct ethhdr *eth_data; |
1211 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1212 | struct slave *tx_slave = NULL; | |
d3bb52b0 | 1213 | static const __be32 ip_bcast = htonl(0xffffffff); |
1da177e4 LT |
1214 | int hash_size = 0; |
1215 | int do_tx_balance = 1; | |
1216 | u32 hash_index = 0; | |
eddc9ec5 | 1217 | const u8 *hash_start = NULL; |
1da177e4 | 1218 | int res = 1; |
2d1ea19d | 1219 | struct ipv6hdr *ip6hdr; |
1da177e4 | 1220 | |
459a98ed | 1221 | skb_reset_mac_header(skb); |
1da177e4 LT |
1222 | eth_data = eth_hdr(skb); |
1223 | ||
0693e88e | 1224 | /* make sure that the curr_active_slave do not change during tx |
1da177e4 | 1225 | */ |
1da177e4 LT |
1226 | read_lock(&bond->curr_slave_lock); |
1227 | ||
1da177e4 | 1228 | switch (ntohs(skb->protocol)) { |
eddc9ec5 ACM |
1229 | case ETH_P_IP: { |
1230 | const struct iphdr *iph = ip_hdr(skb); | |
1231 | ||
885a136c | 1232 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast) || |
eddc9ec5 ACM |
1233 | (iph->daddr == ip_bcast) || |
1234 | (iph->protocol == IPPROTO_IGMP)) { | |
1da177e4 LT |
1235 | do_tx_balance = 0; |
1236 | break; | |
1237 | } | |
eddc9ec5 ACM |
1238 | hash_start = (char *)&(iph->daddr); |
1239 | hash_size = sizeof(iph->daddr); | |
1240 | } | |
1da177e4 LT |
1241 | break; |
1242 | case ETH_P_IPV6: | |
2d1ea19d VY |
1243 | /* IPv6 doesn't really use broadcast mac address, but leave |
1244 | * that here just in case. | |
1245 | */ | |
885a136c | 1246 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast)) { |
1da177e4 LT |
1247 | do_tx_balance = 0; |
1248 | break; | |
2d1ea19d VY |
1249 | } |
1250 | ||
1251 | /* IPv6 uses all-nodes multicast as an equivalent to | |
1252 | * broadcasts in IPv4. | |
1253 | */ | |
885a136c | 1254 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_v6_allmcast)) { |
2d1ea19d VY |
1255 | do_tx_balance = 0; |
1256 | break; | |
1257 | } | |
1258 | ||
1259 | /* Additianally, DAD probes should not be tx-balanced as that | |
1260 | * will lead to false positives for duplicate addresses and | |
1261 | * prevent address configuration from working. | |
1262 | */ | |
1263 | ip6hdr = ipv6_hdr(skb); | |
1264 | if (ipv6_addr_any(&ip6hdr->saddr)) { | |
1265 | do_tx_balance = 0; | |
1266 | break; | |
1da177e4 LT |
1267 | } |
1268 | ||
0660e03f ACM |
1269 | hash_start = (char *)&(ipv6_hdr(skb)->daddr); |
1270 | hash_size = sizeof(ipv6_hdr(skb)->daddr); | |
1da177e4 LT |
1271 | break; |
1272 | case ETH_P_IPX: | |
d3bb52b0 | 1273 | if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) { |
1da177e4 LT |
1274 | /* something is wrong with this packet */ |
1275 | do_tx_balance = 0; | |
1276 | break; | |
1277 | } | |
1278 | ||
1279 | if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) { | |
1280 | /* The only protocol worth balancing in | |
1281 | * this family since it has an "ARP" like | |
1282 | * mechanism | |
1283 | */ | |
1284 | do_tx_balance = 0; | |
1285 | break; | |
1286 | } | |
1287 | ||
1288 | hash_start = (char*)eth_data->h_dest; | |
1289 | hash_size = ETH_ALEN; | |
1290 | break; | |
1291 | case ETH_P_ARP: | |
1292 | do_tx_balance = 0; | |
1293 | if (bond_info->rlb_enabled) { | |
1294 | tx_slave = rlb_arp_xmit(skb, bond); | |
1295 | } | |
1296 | break; | |
1297 | default: | |
1298 | do_tx_balance = 0; | |
1299 | break; | |
1300 | } | |
1301 | ||
1302 | if (do_tx_balance) { | |
1303 | hash_index = _simple_hash(hash_start, hash_size); | |
1304 | tx_slave = tlb_choose_channel(bond, hash_index, skb->len); | |
1305 | } | |
1306 | ||
1307 | if (!tx_slave) { | |
1308 | /* unbalanced or unassigned, send through primary */ | |
1309 | tx_slave = bond->curr_active_slave; | |
1310 | bond_info->unbalanced_load += skb->len; | |
1311 | } | |
1312 | ||
1313 | if (tx_slave && SLAVE_IS_OK(tx_slave)) { | |
1314 | if (tx_slave != bond->curr_active_slave) { | |
1315 | memcpy(eth_data->h_source, | |
1316 | tx_slave->dev->dev_addr, | |
1317 | ETH_ALEN); | |
1318 | } | |
1319 | ||
1320 | res = bond_dev_queue_xmit(bond, skb, tx_slave->dev); | |
1321 | } else { | |
1322 | if (tx_slave) { | |
1323 | tlb_clear_slave(bond, tx_slave, 0); | |
1324 | } | |
1325 | } | |
1326 | ||
1da177e4 LT |
1327 | if (res) { |
1328 | /* no suitable interface, frame not sent */ | |
1329 | dev_kfree_skb(skb); | |
1330 | } | |
1331 | read_unlock(&bond->curr_slave_lock); | |
0693e88e | 1332 | |
ec634fe3 | 1333 | return NETDEV_TX_OK; |
1da177e4 LT |
1334 | } |
1335 | ||
1b76b316 | 1336 | void bond_alb_monitor(struct work_struct *work) |
1da177e4 | 1337 | { |
1b76b316 JV |
1338 | struct bonding *bond = container_of(work, struct bonding, |
1339 | alb_work.work); | |
1da177e4 LT |
1340 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
1341 | struct slave *slave; | |
1342 | int i; | |
1343 | ||
1344 | read_lock(&bond->lock); | |
1345 | ||
1da177e4 LT |
1346 | if (bond->slave_cnt == 0) { |
1347 | bond_info->tx_rebalance_counter = 0; | |
1348 | bond_info->lp_counter = 0; | |
1349 | goto re_arm; | |
1350 | } | |
1351 | ||
1352 | bond_info->tx_rebalance_counter++; | |
1353 | bond_info->lp_counter++; | |
1354 | ||
1355 | /* send learning packets */ | |
1356 | if (bond_info->lp_counter >= BOND_ALB_LP_TICKS) { | |
1357 | /* change of curr_active_slave involves swapping of mac addresses. | |
1358 | * in order to avoid this swapping from happening while | |
1359 | * sending the learning packets, the curr_slave_lock must be held for | |
1360 | * read. | |
1361 | */ | |
1362 | read_lock(&bond->curr_slave_lock); | |
1363 | ||
1364 | bond_for_each_slave(bond, slave, i) { | |
e944ef79 | 1365 | alb_send_learning_packets(slave, slave->dev->dev_addr); |
1da177e4 LT |
1366 | } |
1367 | ||
1368 | read_unlock(&bond->curr_slave_lock); | |
1369 | ||
1370 | bond_info->lp_counter = 0; | |
1371 | } | |
1372 | ||
1373 | /* rebalance tx traffic */ | |
1374 | if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) { | |
1375 | ||
1376 | read_lock(&bond->curr_slave_lock); | |
1377 | ||
1378 | bond_for_each_slave(bond, slave, i) { | |
1379 | tlb_clear_slave(bond, slave, 1); | |
1380 | if (slave == bond->curr_active_slave) { | |
1381 | SLAVE_TLB_INFO(slave).load = | |
1382 | bond_info->unbalanced_load / | |
1383 | BOND_TLB_REBALANCE_INTERVAL; | |
1384 | bond_info->unbalanced_load = 0; | |
1385 | } | |
1386 | } | |
1387 | ||
1388 | read_unlock(&bond->curr_slave_lock); | |
1389 | ||
1390 | bond_info->tx_rebalance_counter = 0; | |
1391 | } | |
1392 | ||
1393 | /* handle rlb stuff */ | |
1394 | if (bond_info->rlb_enabled) { | |
1da177e4 LT |
1395 | if (bond_info->primary_is_promisc && |
1396 | (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) { | |
1397 | ||
d0e81b7e JV |
1398 | /* |
1399 | * dev_set_promiscuity requires rtnl and | |
e6d265e8 | 1400 | * nothing else. Avoid race with bond_close. |
d0e81b7e JV |
1401 | */ |
1402 | read_unlock(&bond->lock); | |
e6d265e8 JV |
1403 | if (!rtnl_trylock()) { |
1404 | read_lock(&bond->lock); | |
1405 | goto re_arm; | |
1406 | } | |
d0e81b7e | 1407 | |
1da177e4 LT |
1408 | bond_info->rlb_promisc_timeout_counter = 0; |
1409 | ||
1410 | /* If the primary was set to promiscuous mode | |
1411 | * because a slave was disabled then | |
1412 | * it can now leave promiscuous mode. | |
1413 | */ | |
1414 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); | |
1415 | bond_info->primary_is_promisc = 0; | |
1da177e4 | 1416 | |
d0e81b7e JV |
1417 | rtnl_unlock(); |
1418 | read_lock(&bond->lock); | |
1419 | } | |
1da177e4 LT |
1420 | |
1421 | if (bond_info->rlb_rebalance) { | |
1422 | bond_info->rlb_rebalance = 0; | |
1423 | rlb_rebalance(bond); | |
1424 | } | |
1425 | ||
1426 | /* check if clients need updating */ | |
1427 | if (bond_info->rx_ntt) { | |
1428 | if (bond_info->rlb_update_delay_counter) { | |
1429 | --bond_info->rlb_update_delay_counter; | |
1430 | } else { | |
1431 | rlb_update_rx_clients(bond); | |
1432 | if (bond_info->rlb_update_retry_counter) { | |
1433 | --bond_info->rlb_update_retry_counter; | |
1434 | } else { | |
1435 | bond_info->rx_ntt = 0; | |
1436 | } | |
1437 | } | |
1438 | } | |
1439 | } | |
1440 | ||
1441 | re_arm: | |
e6d265e8 JV |
1442 | queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks); |
1443 | ||
1da177e4 LT |
1444 | read_unlock(&bond->lock); |
1445 | } | |
1446 | ||
1447 | /* assumption: called before the slave is attached to the bond | |
1448 | * and not locked by the bond lock | |
1449 | */ | |
1450 | int bond_alb_init_slave(struct bonding *bond, struct slave *slave) | |
1451 | { | |
1452 | int res; | |
1453 | ||
1454 | res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr, | |
1455 | bond->alb_info.rlb_enabled); | |
1456 | if (res) { | |
1457 | return res; | |
1458 | } | |
1459 | ||
1460 | /* caller must hold the bond lock for write since the mac addresses | |
1461 | * are compared and may be swapped. | |
1462 | */ | |
6603a6f2 | 1463 | read_lock(&bond->lock); |
1da177e4 LT |
1464 | |
1465 | res = alb_handle_addr_collision_on_attach(bond, slave); | |
1466 | ||
6603a6f2 | 1467 | read_unlock(&bond->lock); |
1da177e4 LT |
1468 | |
1469 | if (res) { | |
1470 | return res; | |
1471 | } | |
1472 | ||
1473 | tlb_init_slave(slave); | |
1474 | ||
1475 | /* order a rebalance ASAP */ | |
1476 | bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; | |
1477 | ||
1478 | if (bond->alb_info.rlb_enabled) { | |
1479 | bond->alb_info.rlb_rebalance = 1; | |
1480 | } | |
1481 | ||
1482 | return 0; | |
1483 | } | |
1484 | ||
2543331d JV |
1485 | /* |
1486 | * Remove slave from tlb and rlb hash tables, and fix up MAC addresses | |
1487 | * if necessary. | |
1488 | * | |
1489 | * Caller must hold RTNL and no other locks | |
1490 | */ | |
1da177e4 LT |
1491 | void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave) |
1492 | { | |
1493 | if (bond->slave_cnt > 1) { | |
1494 | alb_change_hw_addr_on_detach(bond, slave); | |
1495 | } | |
1496 | ||
1497 | tlb_clear_slave(bond, slave, 0); | |
1498 | ||
1499 | if (bond->alb_info.rlb_enabled) { | |
1500 | bond->alb_info.next_rx_slave = NULL; | |
1501 | rlb_clear_slave(bond, slave); | |
1502 | } | |
1503 | } | |
1504 | ||
1505 | /* Caller must hold bond lock for read */ | |
1506 | void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link) | |
1507 | { | |
1508 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1509 | ||
1510 | if (link == BOND_LINK_DOWN) { | |
1511 | tlb_clear_slave(bond, slave, 0); | |
1512 | if (bond->alb_info.rlb_enabled) { | |
1513 | rlb_clear_slave(bond, slave); | |
1514 | } | |
1515 | } else if (link == BOND_LINK_UP) { | |
1516 | /* order a rebalance ASAP */ | |
1517 | bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; | |
1518 | if (bond->alb_info.rlb_enabled) { | |
1519 | bond->alb_info.rlb_rebalance = 1; | |
1520 | /* If the updelay module parameter is smaller than the | |
1521 | * forwarding delay of the switch the rebalance will | |
1522 | * not work because the rebalance arp replies will | |
1523 | * not be forwarded to the clients.. | |
1524 | */ | |
1525 | } | |
1526 | } | |
1527 | } | |
1528 | ||
1529 | /** | |
1530 | * bond_alb_handle_active_change - assign new curr_active_slave | |
1531 | * @bond: our bonding struct | |
1532 | * @new_slave: new slave to assign | |
1533 | * | |
1534 | * Set the bond->curr_active_slave to @new_slave and handle | |
1535 | * mac address swapping and promiscuity changes as needed. | |
1536 | * | |
059fe7a5 JV |
1537 | * If new_slave is NULL, caller must hold curr_slave_lock or |
1538 | * bond->lock for write. | |
1539 | * | |
1540 | * If new_slave is not NULL, caller must hold RTNL, bond->lock for | |
1541 | * read and curr_slave_lock for write. Processing here may sleep, so | |
1542 | * no other locks may be held. | |
1da177e4 LT |
1543 | */ |
1544 | void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave) | |
1f78d9f9 HE |
1545 | __releases(&bond->curr_slave_lock) |
1546 | __releases(&bond->lock) | |
1547 | __acquires(&bond->lock) | |
1548 | __acquires(&bond->curr_slave_lock) | |
1da177e4 LT |
1549 | { |
1550 | struct slave *swap_slave; | |
1551 | int i; | |
1552 | ||
1553 | if (bond->curr_active_slave == new_slave) { | |
1554 | return; | |
1555 | } | |
1556 | ||
1557 | if (bond->curr_active_slave && bond->alb_info.primary_is_promisc) { | |
1558 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); | |
1559 | bond->alb_info.primary_is_promisc = 0; | |
1560 | bond->alb_info.rlb_promisc_timeout_counter = 0; | |
1561 | } | |
1562 | ||
1563 | swap_slave = bond->curr_active_slave; | |
1564 | bond->curr_active_slave = new_slave; | |
1565 | ||
1566 | if (!new_slave || (bond->slave_cnt == 0)) { | |
1567 | return; | |
1568 | } | |
1569 | ||
1570 | /* set the new curr_active_slave to the bonds mac address | |
1571 | * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave | |
1572 | */ | |
1573 | if (!swap_slave) { | |
1574 | struct slave *tmp_slave; | |
1575 | /* find slave that is holding the bond's mac address */ | |
1576 | bond_for_each_slave(bond, tmp_slave, i) { | |
885a136c ED |
1577 | if (!compare_ether_addr_64bits(tmp_slave->dev->dev_addr, |
1578 | bond->dev->dev_addr)) { | |
1da177e4 LT |
1579 | swap_slave = tmp_slave; |
1580 | break; | |
1581 | } | |
1582 | } | |
1583 | } | |
1584 | ||
059fe7a5 JV |
1585 | /* |
1586 | * Arrange for swap_slave and new_slave to temporarily be | |
1587 | * ignored so we can mess with their MAC addresses without | |
1588 | * fear of interference from transmit activity. | |
1589 | */ | |
1590 | if (swap_slave) { | |
1591 | tlb_clear_slave(bond, swap_slave, 1); | |
1592 | } | |
1593 | tlb_clear_slave(bond, new_slave, 1); | |
1594 | ||
1595 | write_unlock_bh(&bond->curr_slave_lock); | |
1596 | read_unlock(&bond->lock); | |
1597 | ||
e0138a66 JV |
1598 | ASSERT_RTNL(); |
1599 | ||
1da177e4 LT |
1600 | /* curr_active_slave must be set before calling alb_swap_mac_addr */ |
1601 | if (swap_slave) { | |
1602 | /* swap mac address */ | |
1603 | alb_swap_mac_addr(bond, swap_slave, new_slave); | |
1604 | } else { | |
1605 | /* set the new_slave to the bond mac address */ | |
1606 | alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr, | |
1607 | bond->alb_info.rlb_enabled); | |
059fe7a5 JV |
1608 | } |
1609 | ||
059fe7a5 JV |
1610 | if (swap_slave) { |
1611 | alb_fasten_mac_swap(bond, swap_slave, new_slave); | |
2543331d | 1612 | read_lock(&bond->lock); |
059fe7a5 | 1613 | } else { |
2543331d | 1614 | read_lock(&bond->lock); |
1da177e4 LT |
1615 | alb_send_learning_packets(new_slave, bond->dev->dev_addr); |
1616 | } | |
059fe7a5 JV |
1617 | |
1618 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 LT |
1619 | } |
1620 | ||
059fe7a5 JV |
1621 | /* |
1622 | * Called with RTNL | |
1623 | */ | |
1da177e4 | 1624 | int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr) |
1f78d9f9 | 1625 | __acquires(&bond->lock) |
815bcc27 | 1626 | __releases(&bond->lock) |
1da177e4 | 1627 | { |
454d7c9b | 1628 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1629 | struct sockaddr *sa = addr; |
1630 | struct slave *slave, *swap_slave; | |
1631 | int res; | |
1632 | int i; | |
1633 | ||
1634 | if (!is_valid_ether_addr(sa->sa_data)) { | |
1635 | return -EADDRNOTAVAIL; | |
1636 | } | |
1637 | ||
1638 | res = alb_set_mac_address(bond, addr); | |
1639 | if (res) { | |
1640 | return res; | |
1641 | } | |
1642 | ||
1643 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
1644 | ||
1645 | /* If there is no curr_active_slave there is nothing else to do. | |
1646 | * Otherwise we'll need to pass the new address to it and handle | |
1647 | * duplications. | |
1648 | */ | |
1649 | if (!bond->curr_active_slave) { | |
1650 | return 0; | |
1651 | } | |
1652 | ||
1653 | swap_slave = NULL; | |
1654 | ||
1655 | bond_for_each_slave(bond, slave, i) { | |
885a136c ED |
1656 | if (!compare_ether_addr_64bits(slave->dev->dev_addr, |
1657 | bond_dev->dev_addr)) { | |
1da177e4 LT |
1658 | swap_slave = slave; |
1659 | break; | |
1660 | } | |
1661 | } | |
1662 | ||
1663 | if (swap_slave) { | |
1664 | alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave); | |
059fe7a5 | 1665 | alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave); |
1da177e4 LT |
1666 | } else { |
1667 | alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr, | |
1668 | bond->alb_info.rlb_enabled); | |
1669 | ||
815bcc27 | 1670 | read_lock(&bond->lock); |
1da177e4 LT |
1671 | alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr); |
1672 | if (bond->alb_info.rlb_enabled) { | |
1673 | /* inform clients mac address has changed */ | |
1674 | rlb_req_update_slave_clients(bond, bond->curr_active_slave); | |
1675 | } | |
815bcc27 | 1676 | read_unlock(&bond->lock); |
1da177e4 LT |
1677 | } |
1678 | ||
1679 | return 0; | |
1680 | } | |
1681 | ||
1682 | void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id) | |
1683 | { | |
1684 | if (bond->alb_info.current_alb_vlan && | |
1685 | (bond->alb_info.current_alb_vlan->vlan_id == vlan_id)) { | |
1686 | bond->alb_info.current_alb_vlan = NULL; | |
1687 | } | |
1688 | ||
1689 | if (bond->alb_info.rlb_enabled) { | |
1690 | rlb_clear_vlan(bond, vlan_id); | |
1691 | } | |
1692 | } | |
1693 |