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 | ||
166 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); | |
167 | ||
243cb4e5 | 168 | new_hashtbl = kzalloc(size, GFP_KERNEL); |
0d206a3a | 169 | if (!new_hashtbl) { |
a4aee5c8 | 170 | pr_err("%s: Error: Failed to allocate TLB hash table\n", |
1da177e4 | 171 | bond->dev->name); |
1da177e4 LT |
172 | return -1; |
173 | } | |
0d206a3a MW |
174 | _lock_tx_hashtbl(bond); |
175 | ||
176 | bond_info->tx_hashtbl = new_hashtbl; | |
1da177e4 | 177 | |
1da177e4 LT |
178 | for (i = 0; i < TLB_HASH_TABLE_SIZE; i++) { |
179 | tlb_init_table_entry(&bond_info->tx_hashtbl[i], 1); | |
180 | } | |
181 | ||
182 | _unlock_tx_hashtbl(bond); | |
183 | ||
184 | return 0; | |
185 | } | |
186 | ||
187 | /* Must be called only after all slaves have been released */ | |
188 | static void tlb_deinitialize(struct bonding *bond) | |
189 | { | |
190 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
191 | ||
192 | _lock_tx_hashtbl(bond); | |
193 | ||
194 | kfree(bond_info->tx_hashtbl); | |
195 | bond_info->tx_hashtbl = NULL; | |
196 | ||
197 | _unlock_tx_hashtbl(bond); | |
198 | } | |
199 | ||
097811bb JP |
200 | static long long compute_gap(struct slave *slave) |
201 | { | |
202 | return (s64) (slave->speed << 20) - /* Convert to Megabit per sec */ | |
203 | (s64) (SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */ | |
204 | } | |
205 | ||
1da177e4 LT |
206 | /* Caller must hold bond lock for read */ |
207 | static struct slave *tlb_get_least_loaded_slave(struct bonding *bond) | |
208 | { | |
209 | struct slave *slave, *least_loaded; | |
097811bb JP |
210 | long long max_gap; |
211 | int i; | |
1da177e4 | 212 | |
097811bb JP |
213 | least_loaded = NULL; |
214 | max_gap = LLONG_MIN; | |
1da177e4 LT |
215 | |
216 | /* Find the slave with the largest gap */ | |
097811bb | 217 | bond_for_each_slave(bond, slave, i) { |
1da177e4 | 218 | if (SLAVE_IS_OK(slave)) { |
097811bb JP |
219 | long long gap = compute_gap(slave); |
220 | ||
1da177e4 LT |
221 | if (max_gap < gap) { |
222 | least_loaded = slave; | |
223 | max_gap = gap; | |
224 | } | |
225 | } | |
226 | } | |
227 | ||
228 | return least_loaded; | |
229 | } | |
230 | ||
231 | /* Caller must hold bond lock for read */ | |
232 | static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u32 skb_len) | |
233 | { | |
234 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
235 | struct tlb_client_info *hash_table; | |
236 | struct slave *assigned_slave; | |
237 | ||
238 | _lock_tx_hashtbl(bond); | |
239 | ||
240 | hash_table = bond_info->tx_hashtbl; | |
241 | assigned_slave = hash_table[hash_index].tx_slave; | |
242 | if (!assigned_slave) { | |
243 | assigned_slave = tlb_get_least_loaded_slave(bond); | |
244 | ||
245 | if (assigned_slave) { | |
246 | struct tlb_slave_info *slave_info = | |
247 | &(SLAVE_TLB_INFO(assigned_slave)); | |
248 | u32 next_index = slave_info->head; | |
249 | ||
250 | hash_table[hash_index].tx_slave = assigned_slave; | |
251 | hash_table[hash_index].next = next_index; | |
252 | hash_table[hash_index].prev = TLB_NULL_INDEX; | |
253 | ||
254 | if (next_index != TLB_NULL_INDEX) { | |
255 | hash_table[next_index].prev = hash_index; | |
256 | } | |
257 | ||
258 | slave_info->head = hash_index; | |
259 | slave_info->load += | |
260 | hash_table[hash_index].load_history; | |
261 | } | |
262 | } | |
263 | ||
264 | if (assigned_slave) { | |
265 | hash_table[hash_index].tx_bytes += skb_len; | |
266 | } | |
267 | ||
268 | _unlock_tx_hashtbl(bond); | |
269 | ||
270 | return assigned_slave; | |
271 | } | |
272 | ||
273 | /*********************** rlb specific functions ***************************/ | |
274 | static inline void _lock_rx_hashtbl(struct bonding *bond) | |
275 | { | |
6603a6f2 | 276 | spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
1da177e4 LT |
277 | } |
278 | ||
279 | static inline void _unlock_rx_hashtbl(struct bonding *bond) | |
280 | { | |
6603a6f2 | 281 | spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
1da177e4 LT |
282 | } |
283 | ||
284 | /* when an ARP REPLY is received from a client update its info | |
285 | * in the rx_hashtbl | |
286 | */ | |
287 | static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp) | |
288 | { | |
289 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
290 | struct rlb_client_info *client_info; | |
291 | u32 hash_index; | |
292 | ||
293 | _lock_rx_hashtbl(bond); | |
294 | ||
295 | hash_index = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src)); | |
296 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
297 | ||
298 | if ((client_info->assigned) && | |
299 | (client_info->ip_src == arp->ip_dst) && | |
42d782ac FL |
300 | (client_info->ip_dst == arp->ip_src) && |
301 | (compare_ether_addr_64bits(client_info->mac_dst, arp->mac_src))) { | |
1da177e4 LT |
302 | /* update the clients MAC address */ |
303 | memcpy(client_info->mac_dst, arp->mac_src, ETH_ALEN); | |
304 | client_info->ntt = 1; | |
305 | bond_info->rx_ntt = 1; | |
306 | } | |
307 | ||
308 | _unlock_rx_hashtbl(bond); | |
309 | } | |
310 | ||
f2ccd8fa | 311 | static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct packet_type *ptype, struct net_device *orig_dev) |
1da177e4 | 312 | { |
6146b1a4 | 313 | struct bonding *bond; |
1da177e4 LT |
314 | struct arp_pkt *arp = (struct arp_pkt *)skb->data; |
315 | int res = NET_RX_DROP; | |
316 | ||
6146b1a4 JV |
317 | while (bond_dev->priv_flags & IFF_802_1Q_VLAN) |
318 | bond_dev = vlan_dev_real_dev(bond_dev); | |
319 | ||
320 | if (!(bond_dev->priv_flags & IFF_BONDING) || | |
321 | !(bond_dev->flags & IFF_MASTER)) | |
1da177e4 | 322 | goto out; |
1da177e4 LT |
323 | |
324 | if (!arp) { | |
5a03cdb7 | 325 | pr_debug("Packet has no ARP data\n"); |
1da177e4 LT |
326 | goto out; |
327 | } | |
328 | ||
b3053251 NH |
329 | skb = skb_share_check(skb, GFP_ATOMIC); |
330 | if (!skb) | |
331 | goto out; | |
332 | ||
ab12811c AG |
333 | if (!pskb_may_pull(skb, arp_hdr_len(bond_dev))) |
334 | goto out; | |
335 | ||
1da177e4 | 336 | if (skb->len < sizeof(struct arp_pkt)) { |
5a03cdb7 | 337 | pr_debug("Packet is too small to be an ARP\n"); |
1da177e4 LT |
338 | goto out; |
339 | } | |
340 | ||
341 | if (arp->op_code == htons(ARPOP_REPLY)) { | |
342 | /* update rx hash table for this ARP */ | |
454d7c9b | 343 | bond = netdev_priv(bond_dev); |
1da177e4 | 344 | rlb_update_entry_from_arp(bond, arp); |
5a03cdb7 | 345 | pr_debug("Server received an ARP Reply from client\n"); |
1da177e4 LT |
346 | } |
347 | ||
348 | res = NET_RX_SUCCESS; | |
349 | ||
350 | out: | |
351 | dev_kfree_skb(skb); | |
352 | ||
353 | return res; | |
354 | } | |
355 | ||
356 | /* Caller must hold bond lock for read */ | |
357 | static struct slave *rlb_next_rx_slave(struct bonding *bond) | |
358 | { | |
359 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
360 | struct slave *rx_slave, *slave, *start_at; | |
361 | int i = 0; | |
362 | ||
363 | if (bond_info->next_rx_slave) { | |
364 | start_at = bond_info->next_rx_slave; | |
365 | } else { | |
366 | start_at = bond->first_slave; | |
367 | } | |
368 | ||
369 | rx_slave = NULL; | |
370 | ||
371 | bond_for_each_slave_from(bond, slave, i, start_at) { | |
372 | if (SLAVE_IS_OK(slave)) { | |
373 | if (!rx_slave) { | |
374 | rx_slave = slave; | |
375 | } else if (slave->speed > rx_slave->speed) { | |
376 | rx_slave = slave; | |
377 | } | |
378 | } | |
379 | } | |
380 | ||
381 | if (rx_slave) { | |
382 | bond_info->next_rx_slave = rx_slave->next; | |
383 | } | |
384 | ||
385 | return rx_slave; | |
386 | } | |
387 | ||
388 | /* teach the switch the mac of a disabled slave | |
389 | * on the primary for fault tolerance | |
390 | * | |
391 | * Caller must hold bond->curr_slave_lock for write or bond lock for write | |
392 | */ | |
393 | static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[]) | |
394 | { | |
395 | if (!bond->curr_active_slave) { | |
396 | return; | |
397 | } | |
398 | ||
399 | if (!bond->alb_info.primary_is_promisc) { | |
7e1a1ac1 WC |
400 | if (!dev_set_promiscuity(bond->curr_active_slave->dev, 1)) |
401 | bond->alb_info.primary_is_promisc = 1; | |
402 | else | |
403 | bond->alb_info.primary_is_promisc = 0; | |
1da177e4 LT |
404 | } |
405 | ||
406 | bond->alb_info.rlb_promisc_timeout_counter = 0; | |
407 | ||
408 | alb_send_learning_packets(bond->curr_active_slave, addr); | |
409 | } | |
410 | ||
411 | /* slave being removed should not be active at this point | |
412 | * | |
413 | * Caller must hold bond lock for read | |
414 | */ | |
415 | static void rlb_clear_slave(struct bonding *bond, struct slave *slave) | |
416 | { | |
417 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
418 | struct rlb_client_info *rx_hash_table; | |
419 | u32 index, next_index; | |
420 | ||
421 | /* clear slave from rx_hashtbl */ | |
422 | _lock_rx_hashtbl(bond); | |
423 | ||
424 | rx_hash_table = bond_info->rx_hashtbl; | |
425 | index = bond_info->rx_hashtbl_head; | |
426 | for (; index != RLB_NULL_INDEX; index = next_index) { | |
427 | next_index = rx_hash_table[index].next; | |
428 | if (rx_hash_table[index].slave == slave) { | |
429 | struct slave *assigned_slave = rlb_next_rx_slave(bond); | |
430 | ||
431 | if (assigned_slave) { | |
432 | rx_hash_table[index].slave = assigned_slave; | |
885a136c ED |
433 | if (compare_ether_addr_64bits(rx_hash_table[index].mac_dst, |
434 | mac_bcast)) { | |
1da177e4 LT |
435 | bond_info->rx_hashtbl[index].ntt = 1; |
436 | bond_info->rx_ntt = 1; | |
437 | /* A slave has been removed from the | |
438 | * table because it is either disabled | |
439 | * or being released. We must retry the | |
440 | * update to avoid clients from not | |
441 | * being updated & disconnecting when | |
442 | * there is stress | |
443 | */ | |
444 | bond_info->rlb_update_retry_counter = | |
445 | RLB_UPDATE_RETRY; | |
446 | } | |
447 | } else { /* there is no active slave */ | |
448 | rx_hash_table[index].slave = NULL; | |
449 | } | |
450 | } | |
451 | } | |
452 | ||
453 | _unlock_rx_hashtbl(bond); | |
454 | ||
6603a6f2 | 455 | write_lock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
456 | |
457 | if (slave != bond->curr_active_slave) { | |
458 | rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr); | |
459 | } | |
460 | ||
6603a6f2 | 461 | write_unlock_bh(&bond->curr_slave_lock); |
1da177e4 LT |
462 | } |
463 | ||
464 | static void rlb_update_client(struct rlb_client_info *client_info) | |
465 | { | |
466 | int i; | |
467 | ||
468 | if (!client_info->slave) { | |
469 | return; | |
470 | } | |
471 | ||
472 | for (i = 0; i < RLB_ARP_BURST_SIZE; i++) { | |
473 | struct sk_buff *skb; | |
474 | ||
475 | skb = arp_create(ARPOP_REPLY, ETH_P_ARP, | |
476 | client_info->ip_dst, | |
477 | client_info->slave->dev, | |
478 | client_info->ip_src, | |
479 | client_info->mac_dst, | |
480 | client_info->slave->dev->dev_addr, | |
481 | client_info->mac_dst); | |
482 | if (!skb) { | |
a4aee5c8 | 483 | pr_err("%s: Error: failed to create an ARP packet\n", |
4e0952c7 | 484 | client_info->slave->dev->master->name); |
1da177e4 LT |
485 | continue; |
486 | } | |
487 | ||
488 | skb->dev = client_info->slave->dev; | |
489 | ||
490 | if (client_info->tag) { | |
491 | skb = vlan_put_tag(skb, client_info->vlan_id); | |
492 | if (!skb) { | |
a4aee5c8 | 493 | pr_err("%s: Error: failed to insert VLAN tag\n", |
4e0952c7 | 494 | client_info->slave->dev->master->name); |
1da177e4 LT |
495 | continue; |
496 | } | |
497 | } | |
498 | ||
499 | arp_xmit(skb); | |
500 | } | |
501 | } | |
502 | ||
503 | /* sends ARP REPLIES that update the clients that need updating */ | |
504 | static void rlb_update_rx_clients(struct bonding *bond) | |
505 | { | |
506 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
507 | struct rlb_client_info *client_info; | |
508 | u32 hash_index; | |
509 | ||
510 | _lock_rx_hashtbl(bond); | |
511 | ||
512 | hash_index = bond_info->rx_hashtbl_head; | |
513 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
514 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
515 | if (client_info->ntt) { | |
516 | rlb_update_client(client_info); | |
517 | if (bond_info->rlb_update_retry_counter == 0) { | |
518 | client_info->ntt = 0; | |
519 | } | |
520 | } | |
521 | } | |
522 | ||
94e2bd68 | 523 | /* do not update the entries again until this counter is zero so that |
1da177e4 LT |
524 | * not to confuse the clients. |
525 | */ | |
526 | bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY; | |
527 | ||
528 | _unlock_rx_hashtbl(bond); | |
529 | } | |
530 | ||
531 | /* The slave was assigned a new mac address - update the clients */ | |
532 | static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave) | |
533 | { | |
534 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
535 | struct rlb_client_info *client_info; | |
536 | int ntt = 0; | |
537 | u32 hash_index; | |
538 | ||
539 | _lock_rx_hashtbl(bond); | |
540 | ||
541 | hash_index = bond_info->rx_hashtbl_head; | |
542 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
543 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
544 | ||
545 | if ((client_info->slave == slave) && | |
885a136c | 546 | compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { |
1da177e4 LT |
547 | client_info->ntt = 1; |
548 | ntt = 1; | |
549 | } | |
550 | } | |
551 | ||
552 | // update the team's flag only after the whole iteration | |
553 | if (ntt) { | |
554 | bond_info->rx_ntt = 1; | |
555 | //fasten the change | |
556 | bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY; | |
557 | } | |
558 | ||
559 | _unlock_rx_hashtbl(bond); | |
560 | } | |
561 | ||
562 | /* mark all clients using src_ip to be updated */ | |
d3bb52b0 | 563 | static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip) |
1da177e4 LT |
564 | { |
565 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
566 | struct rlb_client_info *client_info; | |
567 | u32 hash_index; | |
568 | ||
569 | _lock_rx_hashtbl(bond); | |
570 | ||
571 | hash_index = bond_info->rx_hashtbl_head; | |
572 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
573 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
574 | ||
575 | if (!client_info->slave) { | |
a4aee5c8 | 576 | pr_err("%s: Error: found a client with no channel in the client's hash table\n", |
4e0952c7 | 577 | bond->dev->name); |
1da177e4 LT |
578 | continue; |
579 | } | |
580 | /*update all clients using this src_ip, that are not assigned | |
581 | * to the team's address (curr_active_slave) and have a known | |
582 | * unicast mac address. | |
583 | */ | |
584 | if ((client_info->ip_src == src_ip) && | |
885a136c ED |
585 | compare_ether_addr_64bits(client_info->slave->dev->dev_addr, |
586 | bond->dev->dev_addr) && | |
587 | compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { | |
1da177e4 LT |
588 | client_info->ntt = 1; |
589 | bond_info->rx_ntt = 1; | |
590 | } | |
591 | } | |
592 | ||
593 | _unlock_rx_hashtbl(bond); | |
594 | } | |
595 | ||
596 | /* Caller must hold both bond and ptr locks for read */ | |
597 | static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond) | |
598 | { | |
599 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
a16aeb36 | 600 | struct arp_pkt *arp = arp_pkt(skb); |
1da177e4 LT |
601 | struct slave *assigned_slave; |
602 | struct rlb_client_info *client_info; | |
603 | u32 hash_index = 0; | |
604 | ||
605 | _lock_rx_hashtbl(bond); | |
606 | ||
e364a341 | 607 | hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_dst)); |
1da177e4 LT |
608 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
609 | ||
610 | if (client_info->assigned) { | |
611 | if ((client_info->ip_src == arp->ip_src) && | |
612 | (client_info->ip_dst == arp->ip_dst)) { | |
613 | /* the entry is already assigned to this client */ | |
885a136c | 614 | if (compare_ether_addr_64bits(arp->mac_dst, mac_bcast)) { |
1da177e4 LT |
615 | /* update mac address from arp */ |
616 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); | |
617 | } | |
618 | ||
619 | assigned_slave = client_info->slave; | |
620 | if (assigned_slave) { | |
621 | _unlock_rx_hashtbl(bond); | |
622 | return assigned_slave; | |
623 | } | |
624 | } else { | |
625 | /* the entry is already assigned to some other client, | |
626 | * move the old client to primary (curr_active_slave) so | |
627 | * that the new client can be assigned to this entry. | |
628 | */ | |
629 | if (bond->curr_active_slave && | |
630 | client_info->slave != bond->curr_active_slave) { | |
631 | client_info->slave = bond->curr_active_slave; | |
632 | rlb_update_client(client_info); | |
633 | } | |
634 | } | |
635 | } | |
636 | /* assign a new slave */ | |
637 | assigned_slave = rlb_next_rx_slave(bond); | |
638 | ||
639 | if (assigned_slave) { | |
640 | client_info->ip_src = arp->ip_src; | |
641 | client_info->ip_dst = arp->ip_dst; | |
642 | /* arp->mac_dst is broadcast for arp reqeusts. | |
643 | * will be updated with clients actual unicast mac address | |
644 | * upon receiving an arp reply. | |
645 | */ | |
646 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); | |
647 | client_info->slave = assigned_slave; | |
648 | ||
885a136c | 649 | if (compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { |
1da177e4 LT |
650 | client_info->ntt = 1; |
651 | bond->alb_info.rx_ntt = 1; | |
652 | } else { | |
653 | client_info->ntt = 0; | |
654 | } | |
655 | ||
f35188fa | 656 | if (bond->vlgrp) { |
966bc6f4 | 657 | if (!vlan_get_tag(skb, &client_info->vlan_id)) |
1da177e4 | 658 | client_info->tag = 1; |
1da177e4 LT |
659 | } |
660 | ||
661 | if (!client_info->assigned) { | |
662 | u32 prev_tbl_head = bond_info->rx_hashtbl_head; | |
663 | bond_info->rx_hashtbl_head = hash_index; | |
664 | client_info->next = prev_tbl_head; | |
665 | if (prev_tbl_head != RLB_NULL_INDEX) { | |
666 | bond_info->rx_hashtbl[prev_tbl_head].prev = | |
667 | hash_index; | |
668 | } | |
669 | client_info->assigned = 1; | |
670 | } | |
671 | } | |
672 | ||
673 | _unlock_rx_hashtbl(bond); | |
674 | ||
675 | return assigned_slave; | |
676 | } | |
677 | ||
678 | /* chooses (and returns) transmit channel for arp reply | |
679 | * does not choose channel for other arp types since they are | |
680 | * sent on the curr_active_slave | |
681 | */ | |
682 | static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond) | |
683 | { | |
a16aeb36 | 684 | struct arp_pkt *arp = arp_pkt(skb); |
1da177e4 LT |
685 | struct slave *tx_slave = NULL; |
686 | ||
f14c4e4e | 687 | if (arp->op_code == htons(ARPOP_REPLY)) { |
1da177e4 LT |
688 | /* the arp must be sent on the selected |
689 | * rx channel | |
690 | */ | |
691 | tx_slave = rlb_choose_channel(skb, bond); | |
692 | if (tx_slave) { | |
693 | memcpy(arp->mac_src,tx_slave->dev->dev_addr, ETH_ALEN); | |
694 | } | |
5a03cdb7 | 695 | pr_debug("Server sent ARP Reply packet\n"); |
f14c4e4e | 696 | } else if (arp->op_code == htons(ARPOP_REQUEST)) { |
1da177e4 LT |
697 | /* Create an entry in the rx_hashtbl for this client as a |
698 | * place holder. | |
699 | * When the arp reply is received the entry will be updated | |
700 | * with the correct unicast address of the client. | |
701 | */ | |
702 | rlb_choose_channel(skb, bond); | |
703 | ||
704 | /* The ARP relpy packets must be delayed so that | |
705 | * they can cancel out the influence of the ARP request. | |
706 | */ | |
707 | bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY; | |
708 | ||
709 | /* arp requests are broadcast and are sent on the primary | |
710 | * the arp request will collapse all clients on the subnet to | |
711 | * the primary slave. We must register these clients to be | |
712 | * updated with their assigned mac. | |
713 | */ | |
714 | rlb_req_update_subnet_clients(bond, arp->ip_src); | |
5a03cdb7 | 715 | pr_debug("Server sent ARP Request packet\n"); |
1da177e4 LT |
716 | } |
717 | ||
718 | return tx_slave; | |
719 | } | |
720 | ||
721 | /* Caller must hold bond lock for read */ | |
722 | static void rlb_rebalance(struct bonding *bond) | |
723 | { | |
724 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
725 | struct slave *assigned_slave; | |
726 | struct rlb_client_info *client_info; | |
727 | int ntt; | |
728 | u32 hash_index; | |
729 | ||
730 | _lock_rx_hashtbl(bond); | |
731 | ||
732 | ntt = 0; | |
733 | hash_index = bond_info->rx_hashtbl_head; | |
734 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { | |
735 | client_info = &(bond_info->rx_hashtbl[hash_index]); | |
736 | assigned_slave = rlb_next_rx_slave(bond); | |
737 | if (assigned_slave && (client_info->slave != assigned_slave)) { | |
738 | client_info->slave = assigned_slave; | |
739 | client_info->ntt = 1; | |
740 | ntt = 1; | |
741 | } | |
742 | } | |
743 | ||
744 | /* update the team's flag only after the whole iteration */ | |
745 | if (ntt) { | |
746 | bond_info->rx_ntt = 1; | |
747 | } | |
748 | _unlock_rx_hashtbl(bond); | |
749 | } | |
750 | ||
751 | /* Caller must hold rx_hashtbl lock */ | |
752 | static void rlb_init_table_entry(struct rlb_client_info *entry) | |
753 | { | |
754 | memset(entry, 0, sizeof(struct rlb_client_info)); | |
755 | entry->next = RLB_NULL_INDEX; | |
756 | entry->prev = RLB_NULL_INDEX; | |
757 | } | |
758 | ||
759 | static int rlb_initialize(struct bonding *bond) | |
760 | { | |
761 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
762 | struct packet_type *pk_type = &(BOND_ALB_INFO(bond).rlb_pkt_type); | |
0d206a3a | 763 | struct rlb_client_info *new_hashtbl; |
1da177e4 LT |
764 | int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info); |
765 | int i; | |
766 | ||
767 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); | |
768 | ||
0d206a3a MW |
769 | new_hashtbl = kmalloc(size, GFP_KERNEL); |
770 | if (!new_hashtbl) { | |
a4aee5c8 | 771 | pr_err("%s: Error: Failed to allocate RLB hash table\n", |
1da177e4 | 772 | bond->dev->name); |
1da177e4 LT |
773 | return -1; |
774 | } | |
0d206a3a MW |
775 | _lock_rx_hashtbl(bond); |
776 | ||
777 | bond_info->rx_hashtbl = new_hashtbl; | |
1da177e4 LT |
778 | |
779 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; | |
780 | ||
781 | for (i = 0; i < RLB_HASH_TABLE_SIZE; i++) { | |
782 | rlb_init_table_entry(bond_info->rx_hashtbl + i); | |
783 | } | |
784 | ||
785 | _unlock_rx_hashtbl(bond); | |
786 | ||
787 | /*initialize packet type*/ | |
09640e63 | 788 | pk_type->type = cpu_to_be16(ETH_P_ARP); |
d8190dff | 789 | pk_type->dev = bond->dev; |
1da177e4 LT |
790 | pk_type->func = rlb_arp_recv; |
791 | ||
792 | /* register to receive ARPs */ | |
793 | dev_add_pack(pk_type); | |
794 | ||
795 | return 0; | |
796 | } | |
797 | ||
798 | static void rlb_deinitialize(struct bonding *bond) | |
799 | { | |
800 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
801 | ||
802 | dev_remove_pack(&(bond_info->rlb_pkt_type)); | |
803 | ||
804 | _lock_rx_hashtbl(bond); | |
805 | ||
806 | kfree(bond_info->rx_hashtbl); | |
807 | bond_info->rx_hashtbl = NULL; | |
808 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; | |
809 | ||
810 | _unlock_rx_hashtbl(bond); | |
811 | } | |
812 | ||
813 | static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id) | |
814 | { | |
815 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
816 | u32 curr_index; | |
817 | ||
818 | _lock_rx_hashtbl(bond); | |
819 | ||
820 | curr_index = bond_info->rx_hashtbl_head; | |
821 | while (curr_index != RLB_NULL_INDEX) { | |
822 | struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]); | |
823 | u32 next_index = bond_info->rx_hashtbl[curr_index].next; | |
824 | u32 prev_index = bond_info->rx_hashtbl[curr_index].prev; | |
825 | ||
826 | if (curr->tag && (curr->vlan_id == vlan_id)) { | |
827 | if (curr_index == bond_info->rx_hashtbl_head) { | |
828 | bond_info->rx_hashtbl_head = next_index; | |
829 | } | |
830 | if (prev_index != RLB_NULL_INDEX) { | |
831 | bond_info->rx_hashtbl[prev_index].next = next_index; | |
832 | } | |
833 | if (next_index != RLB_NULL_INDEX) { | |
834 | bond_info->rx_hashtbl[next_index].prev = prev_index; | |
835 | } | |
836 | ||
837 | rlb_init_table_entry(curr); | |
838 | } | |
839 | ||
840 | curr_index = next_index; | |
841 | } | |
842 | ||
843 | _unlock_rx_hashtbl(bond); | |
844 | } | |
845 | ||
846 | /*********************** tlb/rlb shared functions *********************/ | |
847 | ||
848 | static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]) | |
849 | { | |
850 | struct bonding *bond = bond_get_bond_by_slave(slave); | |
851 | struct learning_pkt pkt; | |
852 | int size = sizeof(struct learning_pkt); | |
853 | int i; | |
854 | ||
855 | memset(&pkt, 0, size); | |
856 | memcpy(pkt.mac_dst, mac_addr, ETH_ALEN); | |
857 | memcpy(pkt.mac_src, mac_addr, ETH_ALEN); | |
09640e63 | 858 | pkt.type = cpu_to_be16(ETH_P_LOOP); |
1da177e4 LT |
859 | |
860 | for (i = 0; i < MAX_LP_BURST; i++) { | |
861 | struct sk_buff *skb; | |
862 | char *data; | |
863 | ||
864 | skb = dev_alloc_skb(size); | |
865 | if (!skb) { | |
866 | return; | |
867 | } | |
868 | ||
869 | data = skb_put(skb, size); | |
870 | memcpy(data, &pkt, size); | |
871 | ||
459a98ed | 872 | skb_reset_mac_header(skb); |
b0e380b1 | 873 | skb->network_header = skb->mac_header + ETH_HLEN; |
1da177e4 LT |
874 | skb->protocol = pkt.type; |
875 | skb->priority = TC_PRIO_CONTROL; | |
876 | skb->dev = slave->dev; | |
877 | ||
f35188fa | 878 | if (bond->vlgrp) { |
1da177e4 LT |
879 | struct vlan_entry *vlan; |
880 | ||
881 | vlan = bond_next_vlan(bond, | |
882 | bond->alb_info.current_alb_vlan); | |
883 | ||
884 | bond->alb_info.current_alb_vlan = vlan; | |
885 | if (!vlan) { | |
886 | kfree_skb(skb); | |
887 | continue; | |
888 | } | |
889 | ||
890 | skb = vlan_put_tag(skb, vlan->vlan_id); | |
891 | if (!skb) { | |
a4aee5c8 | 892 | pr_err("%s: Error: failed to insert VLAN tag\n", |
4e0952c7 | 893 | bond->dev->name); |
1da177e4 LT |
894 | continue; |
895 | } | |
896 | } | |
897 | ||
898 | dev_queue_xmit(skb); | |
899 | } | |
900 | } | |
901 | ||
902 | /* hw is a boolean parameter that determines whether we should try and | |
903 | * set the hw address of the device as well as the hw address of the | |
904 | * net_device | |
905 | */ | |
906 | static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[], int hw) | |
907 | { | |
908 | struct net_device *dev = slave->dev; | |
909 | struct sockaddr s_addr; | |
910 | ||
911 | if (!hw) { | |
912 | memcpy(dev->dev_addr, addr, dev->addr_len); | |
913 | return 0; | |
914 | } | |
915 | ||
916 | /* for rlb each slave must have a unique hw mac addresses so that */ | |
917 | /* each slave will receive packets destined to a different mac */ | |
918 | memcpy(s_addr.sa_data, addr, dev->addr_len); | |
919 | s_addr.sa_family = dev->type; | |
920 | if (dev_set_mac_address(dev, &s_addr)) { | |
a4aee5c8 JP |
921 | pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n" |
922 | "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n", | |
4e0952c7 | 923 | dev->master->name, dev->name); |
1da177e4 LT |
924 | return -EOPNOTSUPP; |
925 | } | |
926 | return 0; | |
927 | } | |
928 | ||
059fe7a5 JV |
929 | /* |
930 | * Swap MAC addresses between two slaves. | |
931 | * | |
932 | * Called with RTNL held, and no other locks. | |
933 | * | |
934 | */ | |
935 | ||
1da177e4 LT |
936 | static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct slave *slave2) |
937 | { | |
1da177e4 | 938 | u8 tmp_mac_addr[ETH_ALEN]; |
1da177e4 LT |
939 | |
940 | memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN); | |
941 | alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr, bond->alb_info.rlb_enabled); | |
942 | alb_set_slave_mac_addr(slave2, tmp_mac_addr, bond->alb_info.rlb_enabled); | |
943 | ||
059fe7a5 JV |
944 | } |
945 | ||
946 | /* | |
947 | * Send learning packets after MAC address swap. | |
948 | * | |
2543331d | 949 | * Called with RTNL and no other locks |
059fe7a5 JV |
950 | */ |
951 | static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1, | |
952 | struct slave *slave2) | |
953 | { | |
954 | int slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2)); | |
955 | struct slave *disabled_slave = NULL; | |
956 | ||
2543331d JV |
957 | ASSERT_RTNL(); |
958 | ||
1da177e4 LT |
959 | /* fasten the change in the switch */ |
960 | if (SLAVE_IS_OK(slave1)) { | |
961 | alb_send_learning_packets(slave1, slave1->dev->dev_addr); | |
962 | if (bond->alb_info.rlb_enabled) { | |
963 | /* inform the clients that the mac address | |
964 | * has changed | |
965 | */ | |
966 | rlb_req_update_slave_clients(bond, slave1); | |
967 | } | |
968 | } else { | |
969 | disabled_slave = slave1; | |
970 | } | |
971 | ||
972 | if (SLAVE_IS_OK(slave2)) { | |
973 | alb_send_learning_packets(slave2, slave2->dev->dev_addr); | |
974 | if (bond->alb_info.rlb_enabled) { | |
975 | /* inform the clients that the mac address | |
976 | * has changed | |
977 | */ | |
978 | rlb_req_update_slave_clients(bond, slave2); | |
979 | } | |
980 | } else { | |
981 | disabled_slave = slave2; | |
982 | } | |
983 | ||
984 | if (bond->alb_info.rlb_enabled && slaves_state_differ) { | |
985 | /* A disabled slave was assigned an active mac addr */ | |
986 | rlb_teach_disabled_mac_on_primary(bond, | |
987 | disabled_slave->dev->dev_addr); | |
988 | } | |
989 | } | |
990 | ||
991 | /** | |
992 | * alb_change_hw_addr_on_detach | |
993 | * @bond: bonding we're working on | |
994 | * @slave: the slave that was just detached | |
995 | * | |
996 | * We assume that @slave was already detached from the slave list. | |
997 | * | |
998 | * If @slave's permanent hw address is different both from its current | |
999 | * address and from @bond's address, then somewhere in the bond there's | |
1000 | * a slave that has @slave's permanet address as its current address. | |
1001 | * We'll make sure that that slave no longer uses @slave's permanent address. | |
1002 | * | |
2543331d | 1003 | * Caller must hold RTNL and no other locks |
1da177e4 LT |
1004 | */ |
1005 | static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave) | |
1006 | { | |
1007 | int perm_curr_diff; | |
1008 | int perm_bond_diff; | |
1009 | ||
885a136c ED |
1010 | perm_curr_diff = compare_ether_addr_64bits(slave->perm_hwaddr, |
1011 | slave->dev->dev_addr); | |
1012 | perm_bond_diff = compare_ether_addr_64bits(slave->perm_hwaddr, | |
1013 | bond->dev->dev_addr); | |
1da177e4 LT |
1014 | |
1015 | if (perm_curr_diff && perm_bond_diff) { | |
1016 | struct slave *tmp_slave; | |
1017 | int i, found = 0; | |
1018 | ||
1019 | bond_for_each_slave(bond, tmp_slave, i) { | |
885a136c ED |
1020 | if (!compare_ether_addr_64bits(slave->perm_hwaddr, |
1021 | tmp_slave->dev->dev_addr)) { | |
1da177e4 LT |
1022 | found = 1; |
1023 | break; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | if (found) { | |
059fe7a5 | 1028 | /* locking: needs RTNL and nothing else */ |
1da177e4 | 1029 | alb_swap_mac_addr(bond, slave, tmp_slave); |
059fe7a5 | 1030 | alb_fasten_mac_swap(bond, slave, tmp_slave); |
1da177e4 LT |
1031 | } |
1032 | } | |
1033 | } | |
1034 | ||
1035 | /** | |
1036 | * alb_handle_addr_collision_on_attach | |
1037 | * @bond: bonding we're working on | |
1038 | * @slave: the slave that was just attached | |
1039 | * | |
1040 | * checks uniqueness of slave's mac address and handles the case the | |
1041 | * new slave uses the bonds mac address. | |
1042 | * | |
1043 | * If the permanent hw address of @slave is @bond's hw address, we need to | |
1044 | * find a different hw address to give @slave, that isn't in use by any other | |
1045 | * slave in the bond. This address must be, of course, one of the premanent | |
1046 | * addresses of the other slaves. | |
1047 | * | |
1048 | * We go over the slave list, and for each slave there we compare its | |
1049 | * permanent hw address with the current address of all the other slaves. | |
1050 | * If no match was found, then we've found a slave with a permanent address | |
1051 | * that isn't used by any other slave in the bond, so we can assign it to | |
1052 | * @slave. | |
1053 | * | |
1054 | * assumption: this function is called before @slave is attached to the | |
1055 | * bond slave list. | |
1056 | * | |
1057 | * caller must hold the bond lock for write since the mac addresses are compared | |
1058 | * and may be swapped. | |
1059 | */ | |
1060 | static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave) | |
1061 | { | |
1062 | struct slave *tmp_slave1, *tmp_slave2, *free_mac_slave; | |
1063 | struct slave *has_bond_addr = bond->curr_active_slave; | |
1064 | int i, j, found = 0; | |
1065 | ||
1066 | if (bond->slave_cnt == 0) { | |
1067 | /* this is the first slave */ | |
1068 | return 0; | |
1069 | } | |
1070 | ||
1071 | /* if slave's mac address differs from bond's mac address | |
1072 | * check uniqueness of slave's mac address against the other | |
1073 | * slaves in the bond. | |
1074 | */ | |
885a136c | 1075 | if (compare_ether_addr_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) { |
1da177e4 | 1076 | bond_for_each_slave(bond, tmp_slave1, i) { |
885a136c ED |
1077 | if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr, |
1078 | slave->dev->dev_addr)) { | |
1da177e4 LT |
1079 | found = 1; |
1080 | break; | |
1081 | } | |
1082 | } | |
1083 | ||
6b38aefe JL |
1084 | if (!found) |
1085 | return 0; | |
1da177e4 | 1086 | |
6b38aefe JL |
1087 | /* Try setting slave mac to bond address and fall-through |
1088 | to code handling that situation below... */ | |
1089 | alb_set_slave_mac_addr(slave, bond->dev->dev_addr, | |
1090 | bond->alb_info.rlb_enabled); | |
1da177e4 LT |
1091 | } |
1092 | ||
1093 | /* The slave's address is equal to the address of the bond. | |
1094 | * Search for a spare address in the bond for this slave. | |
1095 | */ | |
1096 | free_mac_slave = NULL; | |
1097 | ||
1098 | bond_for_each_slave(bond, tmp_slave1, i) { | |
1099 | found = 0; | |
1100 | bond_for_each_slave(bond, tmp_slave2, j) { | |
885a136c ED |
1101 | if (!compare_ether_addr_64bits(tmp_slave1->perm_hwaddr, |
1102 | tmp_slave2->dev->dev_addr)) { | |
1da177e4 LT |
1103 | found = 1; |
1104 | break; | |
1105 | } | |
1106 | } | |
1107 | ||
1108 | if (!found) { | |
1109 | /* no slave has tmp_slave1's perm addr | |
1110 | * as its curr addr | |
1111 | */ | |
1112 | free_mac_slave = tmp_slave1; | |
1113 | break; | |
1114 | } | |
1115 | ||
1116 | if (!has_bond_addr) { | |
885a136c ED |
1117 | if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr, |
1118 | bond->dev->dev_addr)) { | |
1da177e4 LT |
1119 | |
1120 | has_bond_addr = tmp_slave1; | |
1121 | } | |
1122 | } | |
1123 | } | |
1124 | ||
1125 | if (free_mac_slave) { | |
1126 | alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr, | |
1127 | bond->alb_info.rlb_enabled); | |
1128 | ||
a4aee5c8 | 1129 | 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 |
1130 | bond->dev->name, slave->dev->name, |
1131 | free_mac_slave->dev->name); | |
1da177e4 LT |
1132 | |
1133 | } else if (has_bond_addr) { | |
a4aee5c8 | 1134 | 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 | 1135 | bond->dev->name, slave->dev->name); |
1da177e4 LT |
1136 | return -EFAULT; |
1137 | } | |
1138 | ||
1139 | return 0; | |
1140 | } | |
1141 | ||
1142 | /** | |
1143 | * alb_set_mac_address | |
1144 | * @bond: | |
1145 | * @addr: | |
1146 | * | |
1147 | * In TLB mode all slaves are configured to the bond's hw address, but set | |
1148 | * their dev_addr field to different addresses (based on their permanent hw | |
1149 | * addresses). | |
1150 | * | |
1151 | * For each slave, this function sets the interface to the new address and then | |
1152 | * changes its dev_addr field to its previous value. | |
1153 | * | |
1154 | * Unwinding assumes bond's mac address has not yet changed. | |
1155 | */ | |
1156 | static int alb_set_mac_address(struct bonding *bond, void *addr) | |
1157 | { | |
1158 | struct sockaddr sa; | |
1159 | struct slave *slave, *stop_at; | |
1160 | char tmp_addr[ETH_ALEN]; | |
1161 | int res; | |
1162 | int i; | |
1163 | ||
1164 | if (bond->alb_info.rlb_enabled) { | |
1165 | return 0; | |
1166 | } | |
1167 | ||
1168 | bond_for_each_slave(bond, slave, i) { | |
1da177e4 LT |
1169 | /* save net_device's current hw address */ |
1170 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); | |
1171 | ||
1172 | res = dev_set_mac_address(slave->dev, addr); | |
1173 | ||
1174 | /* restore net_device's hw address */ | |
1175 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); | |
1176 | ||
eb7cc59a | 1177 | if (res) |
1da177e4 | 1178 | goto unwind; |
1da177e4 LT |
1179 | } |
1180 | ||
1181 | return 0; | |
1182 | ||
1183 | unwind: | |
1184 | memcpy(sa.sa_data, bond->dev->dev_addr, bond->dev->addr_len); | |
1185 | sa.sa_family = bond->dev->type; | |
1186 | ||
1187 | /* unwind from head to the slave that failed */ | |
1188 | stop_at = slave; | |
1189 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { | |
1190 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); | |
1191 | dev_set_mac_address(slave->dev, &sa); | |
1192 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); | |
1193 | } | |
1194 | ||
1195 | return res; | |
1196 | } | |
1197 | ||
1198 | /************************ exported alb funcions ************************/ | |
1199 | ||
1200 | int bond_alb_initialize(struct bonding *bond, int rlb_enabled) | |
1201 | { | |
1202 | int res; | |
1203 | ||
1204 | res = tlb_initialize(bond); | |
1205 | if (res) { | |
1206 | return res; | |
1207 | } | |
1208 | ||
1209 | if (rlb_enabled) { | |
1210 | bond->alb_info.rlb_enabled = 1; | |
1211 | /* initialize rlb */ | |
1212 | res = rlb_initialize(bond); | |
1213 | if (res) { | |
1214 | tlb_deinitialize(bond); | |
1215 | return res; | |
1216 | } | |
b76850ab MW |
1217 | } else { |
1218 | bond->alb_info.rlb_enabled = 0; | |
1da177e4 LT |
1219 | } |
1220 | ||
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | void bond_alb_deinitialize(struct bonding *bond) | |
1225 | { | |
1226 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1227 | ||
1228 | tlb_deinitialize(bond); | |
1229 | ||
1230 | if (bond_info->rlb_enabled) { | |
1231 | rlb_deinitialize(bond); | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev) | |
1236 | { | |
454d7c9b | 1237 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1238 | struct ethhdr *eth_data; |
1239 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1240 | struct slave *tx_slave = NULL; | |
d3bb52b0 | 1241 | static const __be32 ip_bcast = htonl(0xffffffff); |
1da177e4 LT |
1242 | int hash_size = 0; |
1243 | int do_tx_balance = 1; | |
1244 | u32 hash_index = 0; | |
eddc9ec5 | 1245 | const u8 *hash_start = NULL; |
1da177e4 | 1246 | int res = 1; |
2d1ea19d | 1247 | struct ipv6hdr *ip6hdr; |
1da177e4 | 1248 | |
459a98ed | 1249 | skb_reset_mac_header(skb); |
1da177e4 LT |
1250 | eth_data = eth_hdr(skb); |
1251 | ||
1252 | /* make sure that the curr_active_slave and the slaves list do | |
1253 | * not change during tx | |
1254 | */ | |
1255 | read_lock(&bond->lock); | |
1256 | read_lock(&bond->curr_slave_lock); | |
1257 | ||
1258 | if (!BOND_IS_OK(bond)) { | |
1259 | goto out; | |
1260 | } | |
1261 | ||
1262 | switch (ntohs(skb->protocol)) { | |
eddc9ec5 ACM |
1263 | case ETH_P_IP: { |
1264 | const struct iphdr *iph = ip_hdr(skb); | |
1265 | ||
885a136c | 1266 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast) || |
eddc9ec5 ACM |
1267 | (iph->daddr == ip_bcast) || |
1268 | (iph->protocol == IPPROTO_IGMP)) { | |
1da177e4 LT |
1269 | do_tx_balance = 0; |
1270 | break; | |
1271 | } | |
eddc9ec5 ACM |
1272 | hash_start = (char *)&(iph->daddr); |
1273 | hash_size = sizeof(iph->daddr); | |
1274 | } | |
1da177e4 LT |
1275 | break; |
1276 | case ETH_P_IPV6: | |
2d1ea19d VY |
1277 | /* IPv6 doesn't really use broadcast mac address, but leave |
1278 | * that here just in case. | |
1279 | */ | |
885a136c | 1280 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast)) { |
1da177e4 LT |
1281 | do_tx_balance = 0; |
1282 | break; | |
2d1ea19d VY |
1283 | } |
1284 | ||
1285 | /* IPv6 uses all-nodes multicast as an equivalent to | |
1286 | * broadcasts in IPv4. | |
1287 | */ | |
885a136c | 1288 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_v6_allmcast)) { |
2d1ea19d VY |
1289 | do_tx_balance = 0; |
1290 | break; | |
1291 | } | |
1292 | ||
1293 | /* Additianally, DAD probes should not be tx-balanced as that | |
1294 | * will lead to false positives for duplicate addresses and | |
1295 | * prevent address configuration from working. | |
1296 | */ | |
1297 | ip6hdr = ipv6_hdr(skb); | |
1298 | if (ipv6_addr_any(&ip6hdr->saddr)) { | |
1299 | do_tx_balance = 0; | |
1300 | break; | |
1da177e4 LT |
1301 | } |
1302 | ||
0660e03f ACM |
1303 | hash_start = (char *)&(ipv6_hdr(skb)->daddr); |
1304 | hash_size = sizeof(ipv6_hdr(skb)->daddr); | |
1da177e4 LT |
1305 | break; |
1306 | case ETH_P_IPX: | |
d3bb52b0 | 1307 | if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) { |
1da177e4 LT |
1308 | /* something is wrong with this packet */ |
1309 | do_tx_balance = 0; | |
1310 | break; | |
1311 | } | |
1312 | ||
1313 | if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) { | |
1314 | /* The only protocol worth balancing in | |
1315 | * this family since it has an "ARP" like | |
1316 | * mechanism | |
1317 | */ | |
1318 | do_tx_balance = 0; | |
1319 | break; | |
1320 | } | |
1321 | ||
1322 | hash_start = (char*)eth_data->h_dest; | |
1323 | hash_size = ETH_ALEN; | |
1324 | break; | |
1325 | case ETH_P_ARP: | |
1326 | do_tx_balance = 0; | |
1327 | if (bond_info->rlb_enabled) { | |
1328 | tx_slave = rlb_arp_xmit(skb, bond); | |
1329 | } | |
1330 | break; | |
1331 | default: | |
1332 | do_tx_balance = 0; | |
1333 | break; | |
1334 | } | |
1335 | ||
1336 | if (do_tx_balance) { | |
1337 | hash_index = _simple_hash(hash_start, hash_size); | |
1338 | tx_slave = tlb_choose_channel(bond, hash_index, skb->len); | |
1339 | } | |
1340 | ||
1341 | if (!tx_slave) { | |
1342 | /* unbalanced or unassigned, send through primary */ | |
1343 | tx_slave = bond->curr_active_slave; | |
1344 | bond_info->unbalanced_load += skb->len; | |
1345 | } | |
1346 | ||
1347 | if (tx_slave && SLAVE_IS_OK(tx_slave)) { | |
1348 | if (tx_slave != bond->curr_active_slave) { | |
1349 | memcpy(eth_data->h_source, | |
1350 | tx_slave->dev->dev_addr, | |
1351 | ETH_ALEN); | |
1352 | } | |
1353 | ||
1354 | res = bond_dev_queue_xmit(bond, skb, tx_slave->dev); | |
1355 | } else { | |
1356 | if (tx_slave) { | |
1357 | tlb_clear_slave(bond, tx_slave, 0); | |
1358 | } | |
1359 | } | |
1360 | ||
1361 | out: | |
1362 | if (res) { | |
1363 | /* no suitable interface, frame not sent */ | |
1364 | dev_kfree_skb(skb); | |
1365 | } | |
1366 | read_unlock(&bond->curr_slave_lock); | |
1367 | read_unlock(&bond->lock); | |
ec634fe3 | 1368 | return NETDEV_TX_OK; |
1da177e4 LT |
1369 | } |
1370 | ||
1b76b316 | 1371 | void bond_alb_monitor(struct work_struct *work) |
1da177e4 | 1372 | { |
1b76b316 JV |
1373 | struct bonding *bond = container_of(work, struct bonding, |
1374 | alb_work.work); | |
1da177e4 LT |
1375 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
1376 | struct slave *slave; | |
1377 | int i; | |
1378 | ||
1379 | read_lock(&bond->lock); | |
1380 | ||
1381 | if (bond->kill_timers) { | |
1382 | goto out; | |
1383 | } | |
1384 | ||
1385 | if (bond->slave_cnt == 0) { | |
1386 | bond_info->tx_rebalance_counter = 0; | |
1387 | bond_info->lp_counter = 0; | |
1388 | goto re_arm; | |
1389 | } | |
1390 | ||
1391 | bond_info->tx_rebalance_counter++; | |
1392 | bond_info->lp_counter++; | |
1393 | ||
1394 | /* send learning packets */ | |
1395 | if (bond_info->lp_counter >= BOND_ALB_LP_TICKS) { | |
1396 | /* change of curr_active_slave involves swapping of mac addresses. | |
1397 | * in order to avoid this swapping from happening while | |
1398 | * sending the learning packets, the curr_slave_lock must be held for | |
1399 | * read. | |
1400 | */ | |
1401 | read_lock(&bond->curr_slave_lock); | |
1402 | ||
1403 | bond_for_each_slave(bond, slave, i) { | |
e944ef79 | 1404 | alb_send_learning_packets(slave, slave->dev->dev_addr); |
1da177e4 LT |
1405 | } |
1406 | ||
1407 | read_unlock(&bond->curr_slave_lock); | |
1408 | ||
1409 | bond_info->lp_counter = 0; | |
1410 | } | |
1411 | ||
1412 | /* rebalance tx traffic */ | |
1413 | if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) { | |
1414 | ||
1415 | read_lock(&bond->curr_slave_lock); | |
1416 | ||
1417 | bond_for_each_slave(bond, slave, i) { | |
1418 | tlb_clear_slave(bond, slave, 1); | |
1419 | if (slave == bond->curr_active_slave) { | |
1420 | SLAVE_TLB_INFO(slave).load = | |
1421 | bond_info->unbalanced_load / | |
1422 | BOND_TLB_REBALANCE_INTERVAL; | |
1423 | bond_info->unbalanced_load = 0; | |
1424 | } | |
1425 | } | |
1426 | ||
1427 | read_unlock(&bond->curr_slave_lock); | |
1428 | ||
1429 | bond_info->tx_rebalance_counter = 0; | |
1430 | } | |
1431 | ||
1432 | /* handle rlb stuff */ | |
1433 | if (bond_info->rlb_enabled) { | |
1da177e4 LT |
1434 | if (bond_info->primary_is_promisc && |
1435 | (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) { | |
1436 | ||
d0e81b7e JV |
1437 | /* |
1438 | * dev_set_promiscuity requires rtnl and | |
1439 | * nothing else. | |
1440 | */ | |
1441 | read_unlock(&bond->lock); | |
1442 | rtnl_lock(); | |
1443 | ||
1da177e4 LT |
1444 | bond_info->rlb_promisc_timeout_counter = 0; |
1445 | ||
1446 | /* If the primary was set to promiscuous mode | |
1447 | * because a slave was disabled then | |
1448 | * it can now leave promiscuous mode. | |
1449 | */ | |
1450 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); | |
1451 | bond_info->primary_is_promisc = 0; | |
1da177e4 | 1452 | |
d0e81b7e JV |
1453 | rtnl_unlock(); |
1454 | read_lock(&bond->lock); | |
1455 | } | |
1da177e4 LT |
1456 | |
1457 | if (bond_info->rlb_rebalance) { | |
1458 | bond_info->rlb_rebalance = 0; | |
1459 | rlb_rebalance(bond); | |
1460 | } | |
1461 | ||
1462 | /* check if clients need updating */ | |
1463 | if (bond_info->rx_ntt) { | |
1464 | if (bond_info->rlb_update_delay_counter) { | |
1465 | --bond_info->rlb_update_delay_counter; | |
1466 | } else { | |
1467 | rlb_update_rx_clients(bond); | |
1468 | if (bond_info->rlb_update_retry_counter) { | |
1469 | --bond_info->rlb_update_retry_counter; | |
1470 | } else { | |
1471 | bond_info->rx_ntt = 0; | |
1472 | } | |
1473 | } | |
1474 | } | |
1475 | } | |
1476 | ||
1477 | re_arm: | |
1b76b316 | 1478 | queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks); |
1da177e4 LT |
1479 | out: |
1480 | read_unlock(&bond->lock); | |
1481 | } | |
1482 | ||
1483 | /* assumption: called before the slave is attached to the bond | |
1484 | * and not locked by the bond lock | |
1485 | */ | |
1486 | int bond_alb_init_slave(struct bonding *bond, struct slave *slave) | |
1487 | { | |
1488 | int res; | |
1489 | ||
1490 | res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr, | |
1491 | bond->alb_info.rlb_enabled); | |
1492 | if (res) { | |
1493 | return res; | |
1494 | } | |
1495 | ||
1496 | /* caller must hold the bond lock for write since the mac addresses | |
1497 | * are compared and may be swapped. | |
1498 | */ | |
6603a6f2 | 1499 | read_lock(&bond->lock); |
1da177e4 LT |
1500 | |
1501 | res = alb_handle_addr_collision_on_attach(bond, slave); | |
1502 | ||
6603a6f2 | 1503 | read_unlock(&bond->lock); |
1da177e4 LT |
1504 | |
1505 | if (res) { | |
1506 | return res; | |
1507 | } | |
1508 | ||
1509 | tlb_init_slave(slave); | |
1510 | ||
1511 | /* order a rebalance ASAP */ | |
1512 | bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; | |
1513 | ||
1514 | if (bond->alb_info.rlb_enabled) { | |
1515 | bond->alb_info.rlb_rebalance = 1; | |
1516 | } | |
1517 | ||
1518 | return 0; | |
1519 | } | |
1520 | ||
2543331d JV |
1521 | /* |
1522 | * Remove slave from tlb and rlb hash tables, and fix up MAC addresses | |
1523 | * if necessary. | |
1524 | * | |
1525 | * Caller must hold RTNL and no other locks | |
1526 | */ | |
1da177e4 LT |
1527 | void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave) |
1528 | { | |
1529 | if (bond->slave_cnt > 1) { | |
1530 | alb_change_hw_addr_on_detach(bond, slave); | |
1531 | } | |
1532 | ||
1533 | tlb_clear_slave(bond, slave, 0); | |
1534 | ||
1535 | if (bond->alb_info.rlb_enabled) { | |
1536 | bond->alb_info.next_rx_slave = NULL; | |
1537 | rlb_clear_slave(bond, slave); | |
1538 | } | |
1539 | } | |
1540 | ||
1541 | /* Caller must hold bond lock for read */ | |
1542 | void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link) | |
1543 | { | |
1544 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); | |
1545 | ||
1546 | if (link == BOND_LINK_DOWN) { | |
1547 | tlb_clear_slave(bond, slave, 0); | |
1548 | if (bond->alb_info.rlb_enabled) { | |
1549 | rlb_clear_slave(bond, slave); | |
1550 | } | |
1551 | } else if (link == BOND_LINK_UP) { | |
1552 | /* order a rebalance ASAP */ | |
1553 | bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; | |
1554 | if (bond->alb_info.rlb_enabled) { | |
1555 | bond->alb_info.rlb_rebalance = 1; | |
1556 | /* If the updelay module parameter is smaller than the | |
1557 | * forwarding delay of the switch the rebalance will | |
1558 | * not work because the rebalance arp replies will | |
1559 | * not be forwarded to the clients.. | |
1560 | */ | |
1561 | } | |
1562 | } | |
1563 | } | |
1564 | ||
1565 | /** | |
1566 | * bond_alb_handle_active_change - assign new curr_active_slave | |
1567 | * @bond: our bonding struct | |
1568 | * @new_slave: new slave to assign | |
1569 | * | |
1570 | * Set the bond->curr_active_slave to @new_slave and handle | |
1571 | * mac address swapping and promiscuity changes as needed. | |
1572 | * | |
059fe7a5 JV |
1573 | * If new_slave is NULL, caller must hold curr_slave_lock or |
1574 | * bond->lock for write. | |
1575 | * | |
1576 | * If new_slave is not NULL, caller must hold RTNL, bond->lock for | |
1577 | * read and curr_slave_lock for write. Processing here may sleep, so | |
1578 | * no other locks may be held. | |
1da177e4 LT |
1579 | */ |
1580 | void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave) | |
1f78d9f9 HE |
1581 | __releases(&bond->curr_slave_lock) |
1582 | __releases(&bond->lock) | |
1583 | __acquires(&bond->lock) | |
1584 | __acquires(&bond->curr_slave_lock) | |
1da177e4 LT |
1585 | { |
1586 | struct slave *swap_slave; | |
1587 | int i; | |
1588 | ||
1589 | if (bond->curr_active_slave == new_slave) { | |
1590 | return; | |
1591 | } | |
1592 | ||
1593 | if (bond->curr_active_slave && bond->alb_info.primary_is_promisc) { | |
1594 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); | |
1595 | bond->alb_info.primary_is_promisc = 0; | |
1596 | bond->alb_info.rlb_promisc_timeout_counter = 0; | |
1597 | } | |
1598 | ||
1599 | swap_slave = bond->curr_active_slave; | |
1600 | bond->curr_active_slave = new_slave; | |
1601 | ||
1602 | if (!new_slave || (bond->slave_cnt == 0)) { | |
1603 | return; | |
1604 | } | |
1605 | ||
1606 | /* set the new curr_active_slave to the bonds mac address | |
1607 | * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave | |
1608 | */ | |
1609 | if (!swap_slave) { | |
1610 | struct slave *tmp_slave; | |
1611 | /* find slave that is holding the bond's mac address */ | |
1612 | bond_for_each_slave(bond, tmp_slave, i) { | |
885a136c ED |
1613 | if (!compare_ether_addr_64bits(tmp_slave->dev->dev_addr, |
1614 | bond->dev->dev_addr)) { | |
1da177e4 LT |
1615 | swap_slave = tmp_slave; |
1616 | break; | |
1617 | } | |
1618 | } | |
1619 | } | |
1620 | ||
059fe7a5 JV |
1621 | /* |
1622 | * Arrange for swap_slave and new_slave to temporarily be | |
1623 | * ignored so we can mess with their MAC addresses without | |
1624 | * fear of interference from transmit activity. | |
1625 | */ | |
1626 | if (swap_slave) { | |
1627 | tlb_clear_slave(bond, swap_slave, 1); | |
1628 | } | |
1629 | tlb_clear_slave(bond, new_slave, 1); | |
1630 | ||
1631 | write_unlock_bh(&bond->curr_slave_lock); | |
1632 | read_unlock(&bond->lock); | |
1633 | ||
e0138a66 JV |
1634 | ASSERT_RTNL(); |
1635 | ||
1da177e4 LT |
1636 | /* curr_active_slave must be set before calling alb_swap_mac_addr */ |
1637 | if (swap_slave) { | |
1638 | /* swap mac address */ | |
1639 | alb_swap_mac_addr(bond, swap_slave, new_slave); | |
1640 | } else { | |
1641 | /* set the new_slave to the bond mac address */ | |
1642 | alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr, | |
1643 | bond->alb_info.rlb_enabled); | |
059fe7a5 JV |
1644 | } |
1645 | ||
059fe7a5 JV |
1646 | if (swap_slave) { |
1647 | alb_fasten_mac_swap(bond, swap_slave, new_slave); | |
2543331d | 1648 | read_lock(&bond->lock); |
059fe7a5 | 1649 | } else { |
2543331d | 1650 | read_lock(&bond->lock); |
1da177e4 LT |
1651 | alb_send_learning_packets(new_slave, bond->dev->dev_addr); |
1652 | } | |
059fe7a5 JV |
1653 | |
1654 | write_lock_bh(&bond->curr_slave_lock); | |
1da177e4 LT |
1655 | } |
1656 | ||
059fe7a5 JV |
1657 | /* |
1658 | * Called with RTNL | |
1659 | */ | |
1da177e4 | 1660 | int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr) |
1f78d9f9 | 1661 | __acquires(&bond->lock) |
815bcc27 | 1662 | __releases(&bond->lock) |
1da177e4 | 1663 | { |
454d7c9b | 1664 | struct bonding *bond = netdev_priv(bond_dev); |
1da177e4 LT |
1665 | struct sockaddr *sa = addr; |
1666 | struct slave *slave, *swap_slave; | |
1667 | int res; | |
1668 | int i; | |
1669 | ||
1670 | if (!is_valid_ether_addr(sa->sa_data)) { | |
1671 | return -EADDRNOTAVAIL; | |
1672 | } | |
1673 | ||
1674 | res = alb_set_mac_address(bond, addr); | |
1675 | if (res) { | |
1676 | return res; | |
1677 | } | |
1678 | ||
1679 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); | |
1680 | ||
1681 | /* If there is no curr_active_slave there is nothing else to do. | |
1682 | * Otherwise we'll need to pass the new address to it and handle | |
1683 | * duplications. | |
1684 | */ | |
1685 | if (!bond->curr_active_slave) { | |
1686 | return 0; | |
1687 | } | |
1688 | ||
1689 | swap_slave = NULL; | |
1690 | ||
1691 | bond_for_each_slave(bond, slave, i) { | |
885a136c ED |
1692 | if (!compare_ether_addr_64bits(slave->dev->dev_addr, |
1693 | bond_dev->dev_addr)) { | |
1da177e4 LT |
1694 | swap_slave = slave; |
1695 | break; | |
1696 | } | |
1697 | } | |
1698 | ||
1699 | if (swap_slave) { | |
1700 | alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave); | |
059fe7a5 | 1701 | alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave); |
1da177e4 LT |
1702 | } else { |
1703 | alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr, | |
1704 | bond->alb_info.rlb_enabled); | |
1705 | ||
815bcc27 | 1706 | read_lock(&bond->lock); |
1da177e4 LT |
1707 | alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr); |
1708 | if (bond->alb_info.rlb_enabled) { | |
1709 | /* inform clients mac address has changed */ | |
1710 | rlb_req_update_slave_clients(bond, bond->curr_active_slave); | |
1711 | } | |
815bcc27 | 1712 | read_unlock(&bond->lock); |
1da177e4 LT |
1713 | } |
1714 | ||
1715 | return 0; | |
1716 | } | |
1717 | ||
1718 | void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id) | |
1719 | { | |
1720 | if (bond->alb_info.current_alb_vlan && | |
1721 | (bond->alb_info.current_alb_vlan->vlan_id == vlan_id)) { | |
1722 | bond->alb_info.current_alb_vlan = NULL; | |
1723 | } | |
1724 | ||
1725 | if (bond->alb_info.rlb_enabled) { | |
1726 | rlb_clear_vlan(bond, vlan_id); | |
1727 | } | |
1728 | } | |
1729 |