Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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 | * |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 21 | */ |
| 22 | |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 23 | #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt |
| 24 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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> |
Vlad Yasevich | 2d1ea19 | 2008-08-28 15:38:41 -0400 | [diff] [blame] | 41 | #include <net/ipv6.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #include <asm/byteorder.h> |
| 43 | #include "bonding.h" |
| 44 | #include "bond_alb.h" |
| 45 | |
| 46 | |
| 47 | #define ALB_TIMER_TICKS_PER_SEC 10 /* should be a divisor of HZ */ |
| 48 | #define BOND_TLB_REBALANCE_INTERVAL 10 /* In seconds, periodic re-balancing. |
| 49 | * Used for division - never set |
| 50 | * to zero !!! |
| 51 | */ |
| 52 | #define BOND_ALB_LP_INTERVAL 1 /* In seconds, periodic send of |
| 53 | * learning packets to the switch |
| 54 | */ |
| 55 | |
| 56 | #define BOND_TLB_REBALANCE_TICKS (BOND_TLB_REBALANCE_INTERVAL \ |
| 57 | * ALB_TIMER_TICKS_PER_SEC) |
| 58 | |
| 59 | #define BOND_ALB_LP_TICKS (BOND_ALB_LP_INTERVAL \ |
| 60 | * ALB_TIMER_TICKS_PER_SEC) |
| 61 | |
| 62 | #define TLB_HASH_TABLE_SIZE 256 /* The size of the clients hash table. |
| 63 | * Note that this value MUST NOT be smaller |
| 64 | * because the key hash table is BYTE wide ! |
| 65 | */ |
| 66 | |
| 67 | |
| 68 | #define TLB_NULL_INDEX 0xffffffff |
| 69 | #define MAX_LP_BURST 3 |
| 70 | |
| 71 | /* rlb defs */ |
| 72 | #define RLB_HASH_TABLE_SIZE 256 |
| 73 | #define RLB_NULL_INDEX 0xffffffff |
| 74 | #define RLB_UPDATE_DELAY 2*ALB_TIMER_TICKS_PER_SEC /* 2 seconds */ |
| 75 | #define RLB_ARP_BURST_SIZE 2 |
| 76 | #define RLB_UPDATE_RETRY 3 /* 3-ticks - must be smaller than the rlb |
| 77 | * rebalance interval (5 min). |
| 78 | */ |
| 79 | /* RLB_PROMISC_TIMEOUT = 10 sec equals the time that the current slave is |
| 80 | * promiscuous after failover |
| 81 | */ |
| 82 | #define RLB_PROMISC_TIMEOUT 10*ALB_TIMER_TICKS_PER_SEC |
| 83 | |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 84 | #ifndef __long_aligned |
| 85 | #define __long_aligned __attribute__((aligned((sizeof(long))))) |
| 86 | #endif |
| 87 | static const u8 mac_bcast[ETH_ALEN] __long_aligned = { |
| 88 | 0xff, 0xff, 0xff, 0xff, 0xff, 0xff |
| 89 | }; |
| 90 | static const u8 mac_v6_allmcast[ETH_ALEN] __long_aligned = { |
| 91 | 0x33, 0x33, 0x00, 0x00, 0x00, 0x01 |
| 92 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | static const int alb_delta_in_ticks = HZ / ALB_TIMER_TICKS_PER_SEC; |
| 94 | |
| 95 | #pragma pack(1) |
| 96 | struct learning_pkt { |
| 97 | u8 mac_dst[ETH_ALEN]; |
| 98 | u8 mac_src[ETH_ALEN]; |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 99 | __be16 type; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | u8 padding[ETH_ZLEN - ETH_HLEN]; |
| 101 | }; |
| 102 | |
| 103 | struct arp_pkt { |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 104 | __be16 hw_addr_space; |
| 105 | __be16 prot_addr_space; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | u8 hw_addr_len; |
| 107 | u8 prot_addr_len; |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 108 | __be16 op_code; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | u8 mac_src[ETH_ALEN]; /* sender hardware address */ |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 110 | __be32 ip_src; /* sender IP address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | u8 mac_dst[ETH_ALEN]; /* target hardware address */ |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 112 | __be32 ip_dst; /* target IP address */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | }; |
| 114 | #pragma pack() |
| 115 | |
Arnaldo Carvalho de Melo | a16aeb3 | 2007-03-10 16:07:19 -0300 | [diff] [blame] | 116 | static inline struct arp_pkt *arp_pkt(const struct sk_buff *skb) |
| 117 | { |
Arnaldo Carvalho de Melo | d56f90a | 2007-04-10 20:50:43 -0700 | [diff] [blame] | 118 | return (struct arp_pkt *)skb_network_header(skb); |
Arnaldo Carvalho de Melo | a16aeb3 | 2007-03-10 16:07:19 -0300 | [diff] [blame] | 119 | } |
| 120 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | /* Forward declaration */ |
| 122 | static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]); |
| 123 | |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 124 | static inline u8 _simple_hash(const u8 *hash_start, int hash_size) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | { |
| 126 | int i; |
| 127 | u8 hash = 0; |
| 128 | |
| 129 | for (i = 0; i < hash_size; i++) { |
| 130 | hash ^= hash_start[i]; |
| 131 | } |
| 132 | |
| 133 | return hash; |
| 134 | } |
| 135 | |
| 136 | /*********************** tlb specific functions ***************************/ |
| 137 | |
| 138 | static inline void _lock_tx_hashtbl(struct bonding *bond) |
| 139 | { |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 140 | spin_lock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | } |
| 142 | |
| 143 | static inline void _unlock_tx_hashtbl(struct bonding *bond) |
| 144 | { |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 145 | spin_unlock_bh(&(BOND_ALB_INFO(bond).tx_hashtbl_lock)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 146 | } |
| 147 | |
| 148 | /* Caller must hold tx_hashtbl lock */ |
| 149 | static inline void tlb_init_table_entry(struct tlb_client_info *entry, int save_load) |
| 150 | { |
| 151 | if (save_load) { |
| 152 | entry->load_history = 1 + entry->tx_bytes / |
| 153 | BOND_TLB_REBALANCE_INTERVAL; |
| 154 | entry->tx_bytes = 0; |
| 155 | } |
| 156 | |
| 157 | entry->tx_slave = NULL; |
| 158 | entry->next = TLB_NULL_INDEX; |
| 159 | entry->prev = TLB_NULL_INDEX; |
| 160 | } |
| 161 | |
| 162 | static inline void tlb_init_slave(struct slave *slave) |
| 163 | { |
| 164 | SLAVE_TLB_INFO(slave).load = 0; |
| 165 | SLAVE_TLB_INFO(slave).head = TLB_NULL_INDEX; |
| 166 | } |
| 167 | |
| 168 | /* Caller must hold bond lock for read */ |
| 169 | static void tlb_clear_slave(struct bonding *bond, struct slave *slave, int save_load) |
| 170 | { |
| 171 | struct tlb_client_info *tx_hash_table; |
| 172 | u32 index; |
| 173 | |
| 174 | _lock_tx_hashtbl(bond); |
| 175 | |
| 176 | /* clear slave from tx_hashtbl */ |
| 177 | tx_hash_table = BOND_ALB_INFO(bond).tx_hashtbl; |
| 178 | |
Andy Gospodarek | ce39a80 | 2008-10-30 17:41:16 -0700 | [diff] [blame] | 179 | /* skip this if we've already freed the tx hash table */ |
| 180 | if (tx_hash_table) { |
| 181 | index = SLAVE_TLB_INFO(slave).head; |
| 182 | while (index != TLB_NULL_INDEX) { |
| 183 | u32 next_index = tx_hash_table[index].next; |
| 184 | tlb_init_table_entry(&tx_hash_table[index], save_load); |
| 185 | index = next_index; |
| 186 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | } |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | tlb_init_slave(slave); |
Jay Vosburgh | 5af47b2 | 2006-01-09 12:14:00 -0800 | [diff] [blame] | 190 | |
| 191 | _unlock_tx_hashtbl(bond); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | } |
| 193 | |
| 194 | /* Must be called before starting the monitor timer */ |
| 195 | static int tlb_initialize(struct bonding *bond) |
| 196 | { |
| 197 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 198 | int size = TLB_HASH_TABLE_SIZE * sizeof(struct tlb_client_info); |
Mitch Williams | 0d206a3 | 2005-11-09 10:35:30 -0800 | [diff] [blame] | 199 | struct tlb_client_info *new_hashtbl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | int i; |
| 201 | |
| 202 | spin_lock_init(&(bond_info->tx_hashtbl_lock)); |
| 203 | |
Joe Jin | 243cb4e | 2007-02-06 14:16:40 -0800 | [diff] [blame] | 204 | new_hashtbl = kzalloc(size, GFP_KERNEL); |
Mitch Williams | 0d206a3 | 2005-11-09 10:35:30 -0800 | [diff] [blame] | 205 | if (!new_hashtbl) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 206 | pr_err("%s: Error: Failed to allocate TLB hash table\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | bond->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 208 | return -1; |
| 209 | } |
Mitch Williams | 0d206a3 | 2005-11-09 10:35:30 -0800 | [diff] [blame] | 210 | _lock_tx_hashtbl(bond); |
| 211 | |
| 212 | bond_info->tx_hashtbl = new_hashtbl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | for (i = 0; i < TLB_HASH_TABLE_SIZE; i++) { |
| 215 | tlb_init_table_entry(&bond_info->tx_hashtbl[i], 1); |
| 216 | } |
| 217 | |
| 218 | _unlock_tx_hashtbl(bond); |
| 219 | |
| 220 | return 0; |
| 221 | } |
| 222 | |
| 223 | /* Must be called only after all slaves have been released */ |
| 224 | static void tlb_deinitialize(struct bonding *bond) |
| 225 | { |
| 226 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 227 | |
| 228 | _lock_tx_hashtbl(bond); |
| 229 | |
| 230 | kfree(bond_info->tx_hashtbl); |
| 231 | bond_info->tx_hashtbl = NULL; |
| 232 | |
| 233 | _unlock_tx_hashtbl(bond); |
| 234 | } |
| 235 | |
| 236 | /* Caller must hold bond lock for read */ |
| 237 | static struct slave *tlb_get_least_loaded_slave(struct bonding *bond) |
| 238 | { |
| 239 | struct slave *slave, *least_loaded; |
| 240 | s64 max_gap; |
| 241 | int i, found = 0; |
| 242 | |
| 243 | /* Find the first enabled slave */ |
| 244 | bond_for_each_slave(bond, slave, i) { |
| 245 | if (SLAVE_IS_OK(slave)) { |
| 246 | found = 1; |
| 247 | break; |
| 248 | } |
| 249 | } |
| 250 | |
| 251 | if (!found) { |
| 252 | return NULL; |
| 253 | } |
| 254 | |
| 255 | least_loaded = slave; |
| 256 | max_gap = (s64)(slave->speed << 20) - /* Convert to Megabit per sec */ |
| 257 | (s64)(SLAVE_TLB_INFO(slave).load << 3); /* Bytes to bits */ |
| 258 | |
| 259 | /* Find the slave with the largest gap */ |
| 260 | bond_for_each_slave_from(bond, slave, i, least_loaded) { |
| 261 | if (SLAVE_IS_OK(slave)) { |
| 262 | s64 gap = (s64)(slave->speed << 20) - |
| 263 | (s64)(SLAVE_TLB_INFO(slave).load << 3); |
| 264 | if (max_gap < gap) { |
| 265 | least_loaded = slave; |
| 266 | max_gap = gap; |
| 267 | } |
| 268 | } |
| 269 | } |
| 270 | |
| 271 | return least_loaded; |
| 272 | } |
| 273 | |
| 274 | /* Caller must hold bond lock for read */ |
| 275 | static struct slave *tlb_choose_channel(struct bonding *bond, u32 hash_index, u32 skb_len) |
| 276 | { |
| 277 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 278 | struct tlb_client_info *hash_table; |
| 279 | struct slave *assigned_slave; |
| 280 | |
| 281 | _lock_tx_hashtbl(bond); |
| 282 | |
| 283 | hash_table = bond_info->tx_hashtbl; |
| 284 | assigned_slave = hash_table[hash_index].tx_slave; |
| 285 | if (!assigned_slave) { |
| 286 | assigned_slave = tlb_get_least_loaded_slave(bond); |
| 287 | |
| 288 | if (assigned_slave) { |
| 289 | struct tlb_slave_info *slave_info = |
| 290 | &(SLAVE_TLB_INFO(assigned_slave)); |
| 291 | u32 next_index = slave_info->head; |
| 292 | |
| 293 | hash_table[hash_index].tx_slave = assigned_slave; |
| 294 | hash_table[hash_index].next = next_index; |
| 295 | hash_table[hash_index].prev = TLB_NULL_INDEX; |
| 296 | |
| 297 | if (next_index != TLB_NULL_INDEX) { |
| 298 | hash_table[next_index].prev = hash_index; |
| 299 | } |
| 300 | |
| 301 | slave_info->head = hash_index; |
| 302 | slave_info->load += |
| 303 | hash_table[hash_index].load_history; |
| 304 | } |
| 305 | } |
| 306 | |
| 307 | if (assigned_slave) { |
| 308 | hash_table[hash_index].tx_bytes += skb_len; |
| 309 | } |
| 310 | |
| 311 | _unlock_tx_hashtbl(bond); |
| 312 | |
| 313 | return assigned_slave; |
| 314 | } |
| 315 | |
| 316 | /*********************** rlb specific functions ***************************/ |
| 317 | static inline void _lock_rx_hashtbl(struct bonding *bond) |
| 318 | { |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 319 | spin_lock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 320 | } |
| 321 | |
| 322 | static inline void _unlock_rx_hashtbl(struct bonding *bond) |
| 323 | { |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 324 | spin_unlock_bh(&(BOND_ALB_INFO(bond).rx_hashtbl_lock)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 325 | } |
| 326 | |
| 327 | /* when an ARP REPLY is received from a client update its info |
| 328 | * in the rx_hashtbl |
| 329 | */ |
| 330 | static void rlb_update_entry_from_arp(struct bonding *bond, struct arp_pkt *arp) |
| 331 | { |
| 332 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 333 | struct rlb_client_info *client_info; |
| 334 | u32 hash_index; |
| 335 | |
| 336 | _lock_rx_hashtbl(bond); |
| 337 | |
| 338 | hash_index = _simple_hash((u8*)&(arp->ip_src), sizeof(arp->ip_src)); |
| 339 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
| 340 | |
| 341 | if ((client_info->assigned) && |
| 342 | (client_info->ip_src == arp->ip_dst) && |
| 343 | (client_info->ip_dst == arp->ip_src)) { |
| 344 | /* update the clients MAC address */ |
| 345 | memcpy(client_info->mac_dst, arp->mac_src, ETH_ALEN); |
| 346 | client_info->ntt = 1; |
| 347 | bond_info->rx_ntt = 1; |
| 348 | } |
| 349 | |
| 350 | _unlock_rx_hashtbl(bond); |
| 351 | } |
| 352 | |
David S. Miller | f2ccd8f | 2005-08-09 19:34:12 -0700 | [diff] [blame] | 353 | static int rlb_arp_recv(struct sk_buff *skb, struct net_device *bond_dev, struct packet_type *ptype, struct net_device *orig_dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 354 | { |
Jay Vosburgh | 6146b1a | 2008-11-04 17:51:15 -0800 | [diff] [blame] | 355 | struct bonding *bond; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | struct arp_pkt *arp = (struct arp_pkt *)skb->data; |
| 357 | int res = NET_RX_DROP; |
| 358 | |
Jay Vosburgh | 6146b1a | 2008-11-04 17:51:15 -0800 | [diff] [blame] | 359 | while (bond_dev->priv_flags & IFF_802_1Q_VLAN) |
| 360 | bond_dev = vlan_dev_real_dev(bond_dev); |
| 361 | |
| 362 | if (!(bond_dev->priv_flags & IFF_BONDING) || |
| 363 | !(bond_dev->flags & IFF_MASTER)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 364 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
| 366 | if (!arp) { |
Holger Eitzenberger | 5a03cdb | 2008-12-09 23:09:22 -0800 | [diff] [blame] | 367 | pr_debug("Packet has no ARP data\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 368 | goto out; |
| 369 | } |
| 370 | |
| 371 | if (skb->len < sizeof(struct arp_pkt)) { |
Holger Eitzenberger | 5a03cdb | 2008-12-09 23:09:22 -0800 | [diff] [blame] | 372 | pr_debug("Packet is too small to be an ARP\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | goto out; |
| 374 | } |
| 375 | |
| 376 | if (arp->op_code == htons(ARPOP_REPLY)) { |
| 377 | /* update rx hash table for this ARP */ |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 378 | bond = netdev_priv(bond_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 379 | rlb_update_entry_from_arp(bond, arp); |
Holger Eitzenberger | 5a03cdb | 2008-12-09 23:09:22 -0800 | [diff] [blame] | 380 | pr_debug("Server received an ARP Reply from client\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | res = NET_RX_SUCCESS; |
| 384 | |
| 385 | out: |
| 386 | dev_kfree_skb(skb); |
| 387 | |
| 388 | return res; |
| 389 | } |
| 390 | |
| 391 | /* Caller must hold bond lock for read */ |
| 392 | static struct slave *rlb_next_rx_slave(struct bonding *bond) |
| 393 | { |
| 394 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 395 | struct slave *rx_slave, *slave, *start_at; |
| 396 | int i = 0; |
| 397 | |
| 398 | if (bond_info->next_rx_slave) { |
| 399 | start_at = bond_info->next_rx_slave; |
| 400 | } else { |
| 401 | start_at = bond->first_slave; |
| 402 | } |
| 403 | |
| 404 | rx_slave = NULL; |
| 405 | |
| 406 | bond_for_each_slave_from(bond, slave, i, start_at) { |
| 407 | if (SLAVE_IS_OK(slave)) { |
| 408 | if (!rx_slave) { |
| 409 | rx_slave = slave; |
| 410 | } else if (slave->speed > rx_slave->speed) { |
| 411 | rx_slave = slave; |
| 412 | } |
| 413 | } |
| 414 | } |
| 415 | |
| 416 | if (rx_slave) { |
| 417 | bond_info->next_rx_slave = rx_slave->next; |
| 418 | } |
| 419 | |
| 420 | return rx_slave; |
| 421 | } |
| 422 | |
| 423 | /* teach the switch the mac of a disabled slave |
| 424 | * on the primary for fault tolerance |
| 425 | * |
| 426 | * Caller must hold bond->curr_slave_lock for write or bond lock for write |
| 427 | */ |
| 428 | static void rlb_teach_disabled_mac_on_primary(struct bonding *bond, u8 addr[]) |
| 429 | { |
| 430 | if (!bond->curr_active_slave) { |
| 431 | return; |
| 432 | } |
| 433 | |
| 434 | if (!bond->alb_info.primary_is_promisc) { |
Wang Chen | 7e1a1ac | 2008-07-14 20:51:36 -0700 | [diff] [blame] | 435 | if (!dev_set_promiscuity(bond->curr_active_slave->dev, 1)) |
| 436 | bond->alb_info.primary_is_promisc = 1; |
| 437 | else |
| 438 | bond->alb_info.primary_is_promisc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 439 | } |
| 440 | |
| 441 | bond->alb_info.rlb_promisc_timeout_counter = 0; |
| 442 | |
| 443 | alb_send_learning_packets(bond->curr_active_slave, addr); |
| 444 | } |
| 445 | |
| 446 | /* slave being removed should not be active at this point |
| 447 | * |
| 448 | * Caller must hold bond lock for read |
| 449 | */ |
| 450 | static void rlb_clear_slave(struct bonding *bond, struct slave *slave) |
| 451 | { |
| 452 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 453 | struct rlb_client_info *rx_hash_table; |
| 454 | u32 index, next_index; |
| 455 | |
| 456 | /* clear slave from rx_hashtbl */ |
| 457 | _lock_rx_hashtbl(bond); |
| 458 | |
| 459 | rx_hash_table = bond_info->rx_hashtbl; |
| 460 | index = bond_info->rx_hashtbl_head; |
| 461 | for (; index != RLB_NULL_INDEX; index = next_index) { |
| 462 | next_index = rx_hash_table[index].next; |
| 463 | if (rx_hash_table[index].slave == slave) { |
| 464 | struct slave *assigned_slave = rlb_next_rx_slave(bond); |
| 465 | |
| 466 | if (assigned_slave) { |
| 467 | rx_hash_table[index].slave = assigned_slave; |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 468 | if (compare_ether_addr_64bits(rx_hash_table[index].mac_dst, |
| 469 | mac_bcast)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 470 | bond_info->rx_hashtbl[index].ntt = 1; |
| 471 | bond_info->rx_ntt = 1; |
| 472 | /* A slave has been removed from the |
| 473 | * table because it is either disabled |
| 474 | * or being released. We must retry the |
| 475 | * update to avoid clients from not |
| 476 | * being updated & disconnecting when |
| 477 | * there is stress |
| 478 | */ |
| 479 | bond_info->rlb_update_retry_counter = |
| 480 | RLB_UPDATE_RETRY; |
| 481 | } |
| 482 | } else { /* there is no active slave */ |
| 483 | rx_hash_table[index].slave = NULL; |
| 484 | } |
| 485 | } |
| 486 | } |
| 487 | |
| 488 | _unlock_rx_hashtbl(bond); |
| 489 | |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 490 | write_lock_bh(&bond->curr_slave_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 491 | |
| 492 | if (slave != bond->curr_active_slave) { |
| 493 | rlb_teach_disabled_mac_on_primary(bond, slave->dev->dev_addr); |
| 494 | } |
| 495 | |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 496 | write_unlock_bh(&bond->curr_slave_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | } |
| 498 | |
| 499 | static void rlb_update_client(struct rlb_client_info *client_info) |
| 500 | { |
| 501 | int i; |
| 502 | |
| 503 | if (!client_info->slave) { |
| 504 | return; |
| 505 | } |
| 506 | |
| 507 | for (i = 0; i < RLB_ARP_BURST_SIZE; i++) { |
| 508 | struct sk_buff *skb; |
| 509 | |
| 510 | skb = arp_create(ARPOP_REPLY, ETH_P_ARP, |
| 511 | client_info->ip_dst, |
| 512 | client_info->slave->dev, |
| 513 | client_info->ip_src, |
| 514 | client_info->mac_dst, |
| 515 | client_info->slave->dev->dev_addr, |
| 516 | client_info->mac_dst); |
| 517 | if (!skb) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 518 | pr_err("%s: Error: failed to create an ARP packet\n", |
Mitch Williams | 4e0952c | 2005-11-09 10:34:57 -0800 | [diff] [blame] | 519 | client_info->slave->dev->master->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | continue; |
| 521 | } |
| 522 | |
| 523 | skb->dev = client_info->slave->dev; |
| 524 | |
| 525 | if (client_info->tag) { |
| 526 | skb = vlan_put_tag(skb, client_info->vlan_id); |
| 527 | if (!skb) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 528 | pr_err("%s: Error: failed to insert VLAN tag\n", |
Mitch Williams | 4e0952c | 2005-11-09 10:34:57 -0800 | [diff] [blame] | 529 | client_info->slave->dev->master->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | continue; |
| 531 | } |
| 532 | } |
| 533 | |
| 534 | arp_xmit(skb); |
| 535 | } |
| 536 | } |
| 537 | |
| 538 | /* sends ARP REPLIES that update the clients that need updating */ |
| 539 | static void rlb_update_rx_clients(struct bonding *bond) |
| 540 | { |
| 541 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 542 | struct rlb_client_info *client_info; |
| 543 | u32 hash_index; |
| 544 | |
| 545 | _lock_rx_hashtbl(bond); |
| 546 | |
| 547 | hash_index = bond_info->rx_hashtbl_head; |
| 548 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { |
| 549 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
| 550 | if (client_info->ntt) { |
| 551 | rlb_update_client(client_info); |
| 552 | if (bond_info->rlb_update_retry_counter == 0) { |
| 553 | client_info->ntt = 0; |
| 554 | } |
| 555 | } |
| 556 | } |
| 557 | |
Thadeu Lima de Souza Cascardo | 94e2bd6 | 2009-10-16 15:20:49 +0200 | [diff] [blame] | 558 | /* do not update the entries again until this counter is zero so that |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 559 | * not to confuse the clients. |
| 560 | */ |
| 561 | bond_info->rlb_update_delay_counter = RLB_UPDATE_DELAY; |
| 562 | |
| 563 | _unlock_rx_hashtbl(bond); |
| 564 | } |
| 565 | |
| 566 | /* The slave was assigned a new mac address - update the clients */ |
| 567 | static void rlb_req_update_slave_clients(struct bonding *bond, struct slave *slave) |
| 568 | { |
| 569 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 570 | struct rlb_client_info *client_info; |
| 571 | int ntt = 0; |
| 572 | u32 hash_index; |
| 573 | |
| 574 | _lock_rx_hashtbl(bond); |
| 575 | |
| 576 | hash_index = bond_info->rx_hashtbl_head; |
| 577 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { |
| 578 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
| 579 | |
| 580 | if ((client_info->slave == slave) && |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 581 | compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | client_info->ntt = 1; |
| 583 | ntt = 1; |
| 584 | } |
| 585 | } |
| 586 | |
| 587 | // update the team's flag only after the whole iteration |
| 588 | if (ntt) { |
| 589 | bond_info->rx_ntt = 1; |
| 590 | //fasten the change |
| 591 | bond_info->rlb_update_retry_counter = RLB_UPDATE_RETRY; |
| 592 | } |
| 593 | |
| 594 | _unlock_rx_hashtbl(bond); |
| 595 | } |
| 596 | |
| 597 | /* mark all clients using src_ip to be updated */ |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 598 | static void rlb_req_update_subnet_clients(struct bonding *bond, __be32 src_ip) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | { |
| 600 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 601 | struct rlb_client_info *client_info; |
| 602 | u32 hash_index; |
| 603 | |
| 604 | _lock_rx_hashtbl(bond); |
| 605 | |
| 606 | hash_index = bond_info->rx_hashtbl_head; |
| 607 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { |
| 608 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
| 609 | |
| 610 | if (!client_info->slave) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 611 | pr_err("%s: Error: found a client with no channel in the client's hash table\n", |
Mitch Williams | 4e0952c | 2005-11-09 10:34:57 -0800 | [diff] [blame] | 612 | bond->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 613 | continue; |
| 614 | } |
| 615 | /*update all clients using this src_ip, that are not assigned |
| 616 | * to the team's address (curr_active_slave) and have a known |
| 617 | * unicast mac address. |
| 618 | */ |
| 619 | if ((client_info->ip_src == src_ip) && |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 620 | compare_ether_addr_64bits(client_info->slave->dev->dev_addr, |
| 621 | bond->dev->dev_addr) && |
| 622 | compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 623 | client_info->ntt = 1; |
| 624 | bond_info->rx_ntt = 1; |
| 625 | } |
| 626 | } |
| 627 | |
| 628 | _unlock_rx_hashtbl(bond); |
| 629 | } |
| 630 | |
| 631 | /* Caller must hold both bond and ptr locks for read */ |
| 632 | static struct slave *rlb_choose_channel(struct sk_buff *skb, struct bonding *bond) |
| 633 | { |
| 634 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
Arnaldo Carvalho de Melo | a16aeb3 | 2007-03-10 16:07:19 -0300 | [diff] [blame] | 635 | struct arp_pkt *arp = arp_pkt(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | struct slave *assigned_slave; |
| 637 | struct rlb_client_info *client_info; |
| 638 | u32 hash_index = 0; |
| 639 | |
| 640 | _lock_rx_hashtbl(bond); |
| 641 | |
| 642 | hash_index = _simple_hash((u8 *)&arp->ip_dst, sizeof(arp->ip_src)); |
| 643 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
| 644 | |
| 645 | if (client_info->assigned) { |
| 646 | if ((client_info->ip_src == arp->ip_src) && |
| 647 | (client_info->ip_dst == arp->ip_dst)) { |
| 648 | /* the entry is already assigned to this client */ |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 649 | if (compare_ether_addr_64bits(arp->mac_dst, mac_bcast)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 650 | /* update mac address from arp */ |
| 651 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); |
| 652 | } |
| 653 | |
| 654 | assigned_slave = client_info->slave; |
| 655 | if (assigned_slave) { |
| 656 | _unlock_rx_hashtbl(bond); |
| 657 | return assigned_slave; |
| 658 | } |
| 659 | } else { |
| 660 | /* the entry is already assigned to some other client, |
| 661 | * move the old client to primary (curr_active_slave) so |
| 662 | * that the new client can be assigned to this entry. |
| 663 | */ |
| 664 | if (bond->curr_active_slave && |
| 665 | client_info->slave != bond->curr_active_slave) { |
| 666 | client_info->slave = bond->curr_active_slave; |
| 667 | rlb_update_client(client_info); |
| 668 | } |
| 669 | } |
| 670 | } |
| 671 | /* assign a new slave */ |
| 672 | assigned_slave = rlb_next_rx_slave(bond); |
| 673 | |
| 674 | if (assigned_slave) { |
| 675 | client_info->ip_src = arp->ip_src; |
| 676 | client_info->ip_dst = arp->ip_dst; |
| 677 | /* arp->mac_dst is broadcast for arp reqeusts. |
| 678 | * will be updated with clients actual unicast mac address |
| 679 | * upon receiving an arp reply. |
| 680 | */ |
| 681 | memcpy(client_info->mac_dst, arp->mac_dst, ETH_ALEN); |
| 682 | client_info->slave = assigned_slave; |
| 683 | |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 684 | if (compare_ether_addr_64bits(client_info->mac_dst, mac_bcast)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 685 | client_info->ntt = 1; |
| 686 | bond->alb_info.rx_ntt = 1; |
| 687 | } else { |
| 688 | client_info->ntt = 0; |
| 689 | } |
| 690 | |
| 691 | if (!list_empty(&bond->vlan_list)) { |
Jay Vosburgh | 966bc6f | 2008-03-21 22:29:34 -0700 | [diff] [blame] | 692 | if (!vlan_get_tag(skb, &client_info->vlan_id)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 693 | client_info->tag = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 694 | } |
| 695 | |
| 696 | if (!client_info->assigned) { |
| 697 | u32 prev_tbl_head = bond_info->rx_hashtbl_head; |
| 698 | bond_info->rx_hashtbl_head = hash_index; |
| 699 | client_info->next = prev_tbl_head; |
| 700 | if (prev_tbl_head != RLB_NULL_INDEX) { |
| 701 | bond_info->rx_hashtbl[prev_tbl_head].prev = |
| 702 | hash_index; |
| 703 | } |
| 704 | client_info->assigned = 1; |
| 705 | } |
| 706 | } |
| 707 | |
| 708 | _unlock_rx_hashtbl(bond); |
| 709 | |
| 710 | return assigned_slave; |
| 711 | } |
| 712 | |
| 713 | /* chooses (and returns) transmit channel for arp reply |
| 714 | * does not choose channel for other arp types since they are |
| 715 | * sent on the curr_active_slave |
| 716 | */ |
| 717 | static struct slave *rlb_arp_xmit(struct sk_buff *skb, struct bonding *bond) |
| 718 | { |
Arnaldo Carvalho de Melo | a16aeb3 | 2007-03-10 16:07:19 -0300 | [diff] [blame] | 719 | struct arp_pkt *arp = arp_pkt(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 720 | struct slave *tx_slave = NULL; |
| 721 | |
Brian Haley | f14c4e4 | 2008-09-02 10:08:08 -0400 | [diff] [blame] | 722 | if (arp->op_code == htons(ARPOP_REPLY)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | /* the arp must be sent on the selected |
| 724 | * rx channel |
| 725 | */ |
| 726 | tx_slave = rlb_choose_channel(skb, bond); |
| 727 | if (tx_slave) { |
| 728 | memcpy(arp->mac_src,tx_slave->dev->dev_addr, ETH_ALEN); |
| 729 | } |
Holger Eitzenberger | 5a03cdb | 2008-12-09 23:09:22 -0800 | [diff] [blame] | 730 | pr_debug("Server sent ARP Reply packet\n"); |
Brian Haley | f14c4e4 | 2008-09-02 10:08:08 -0400 | [diff] [blame] | 731 | } else if (arp->op_code == htons(ARPOP_REQUEST)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 732 | /* Create an entry in the rx_hashtbl for this client as a |
| 733 | * place holder. |
| 734 | * When the arp reply is received the entry will be updated |
| 735 | * with the correct unicast address of the client. |
| 736 | */ |
| 737 | rlb_choose_channel(skb, bond); |
| 738 | |
| 739 | /* The ARP relpy packets must be delayed so that |
| 740 | * they can cancel out the influence of the ARP request. |
| 741 | */ |
| 742 | bond->alb_info.rlb_update_delay_counter = RLB_UPDATE_DELAY; |
| 743 | |
| 744 | /* arp requests are broadcast and are sent on the primary |
| 745 | * the arp request will collapse all clients on the subnet to |
| 746 | * the primary slave. We must register these clients to be |
| 747 | * updated with their assigned mac. |
| 748 | */ |
| 749 | rlb_req_update_subnet_clients(bond, arp->ip_src); |
Holger Eitzenberger | 5a03cdb | 2008-12-09 23:09:22 -0800 | [diff] [blame] | 750 | pr_debug("Server sent ARP Request packet\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 751 | } |
| 752 | |
| 753 | return tx_slave; |
| 754 | } |
| 755 | |
| 756 | /* Caller must hold bond lock for read */ |
| 757 | static void rlb_rebalance(struct bonding *bond) |
| 758 | { |
| 759 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 760 | struct slave *assigned_slave; |
| 761 | struct rlb_client_info *client_info; |
| 762 | int ntt; |
| 763 | u32 hash_index; |
| 764 | |
| 765 | _lock_rx_hashtbl(bond); |
| 766 | |
| 767 | ntt = 0; |
| 768 | hash_index = bond_info->rx_hashtbl_head; |
| 769 | for (; hash_index != RLB_NULL_INDEX; hash_index = client_info->next) { |
| 770 | client_info = &(bond_info->rx_hashtbl[hash_index]); |
| 771 | assigned_slave = rlb_next_rx_slave(bond); |
| 772 | if (assigned_slave && (client_info->slave != assigned_slave)) { |
| 773 | client_info->slave = assigned_slave; |
| 774 | client_info->ntt = 1; |
| 775 | ntt = 1; |
| 776 | } |
| 777 | } |
| 778 | |
| 779 | /* update the team's flag only after the whole iteration */ |
| 780 | if (ntt) { |
| 781 | bond_info->rx_ntt = 1; |
| 782 | } |
| 783 | _unlock_rx_hashtbl(bond); |
| 784 | } |
| 785 | |
| 786 | /* Caller must hold rx_hashtbl lock */ |
| 787 | static void rlb_init_table_entry(struct rlb_client_info *entry) |
| 788 | { |
| 789 | memset(entry, 0, sizeof(struct rlb_client_info)); |
| 790 | entry->next = RLB_NULL_INDEX; |
| 791 | entry->prev = RLB_NULL_INDEX; |
| 792 | } |
| 793 | |
| 794 | static int rlb_initialize(struct bonding *bond) |
| 795 | { |
| 796 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 797 | struct packet_type *pk_type = &(BOND_ALB_INFO(bond).rlb_pkt_type); |
Mitch Williams | 0d206a3 | 2005-11-09 10:35:30 -0800 | [diff] [blame] | 798 | struct rlb_client_info *new_hashtbl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 799 | int size = RLB_HASH_TABLE_SIZE * sizeof(struct rlb_client_info); |
| 800 | int i; |
| 801 | |
| 802 | spin_lock_init(&(bond_info->rx_hashtbl_lock)); |
| 803 | |
Mitch Williams | 0d206a3 | 2005-11-09 10:35:30 -0800 | [diff] [blame] | 804 | new_hashtbl = kmalloc(size, GFP_KERNEL); |
| 805 | if (!new_hashtbl) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 806 | pr_err("%s: Error: Failed to allocate RLB hash table\n", |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | bond->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 808 | return -1; |
| 809 | } |
Mitch Williams | 0d206a3 | 2005-11-09 10:35:30 -0800 | [diff] [blame] | 810 | _lock_rx_hashtbl(bond); |
| 811 | |
| 812 | bond_info->rx_hashtbl = new_hashtbl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 813 | |
| 814 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; |
| 815 | |
| 816 | for (i = 0; i < RLB_HASH_TABLE_SIZE; i++) { |
| 817 | rlb_init_table_entry(bond_info->rx_hashtbl + i); |
| 818 | } |
| 819 | |
| 820 | _unlock_rx_hashtbl(bond); |
| 821 | |
| 822 | /*initialize packet type*/ |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 823 | pk_type->type = cpu_to_be16(ETH_P_ARP); |
Jay Vosburgh | 6146b1a | 2008-11-04 17:51:15 -0800 | [diff] [blame] | 824 | pk_type->dev = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | pk_type->func = rlb_arp_recv; |
| 826 | |
| 827 | /* register to receive ARPs */ |
| 828 | dev_add_pack(pk_type); |
| 829 | |
| 830 | return 0; |
| 831 | } |
| 832 | |
| 833 | static void rlb_deinitialize(struct bonding *bond) |
| 834 | { |
| 835 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 836 | |
| 837 | dev_remove_pack(&(bond_info->rlb_pkt_type)); |
| 838 | |
| 839 | _lock_rx_hashtbl(bond); |
| 840 | |
| 841 | kfree(bond_info->rx_hashtbl); |
| 842 | bond_info->rx_hashtbl = NULL; |
| 843 | bond_info->rx_hashtbl_head = RLB_NULL_INDEX; |
| 844 | |
| 845 | _unlock_rx_hashtbl(bond); |
| 846 | } |
| 847 | |
| 848 | static void rlb_clear_vlan(struct bonding *bond, unsigned short vlan_id) |
| 849 | { |
| 850 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 851 | u32 curr_index; |
| 852 | |
| 853 | _lock_rx_hashtbl(bond); |
| 854 | |
| 855 | curr_index = bond_info->rx_hashtbl_head; |
| 856 | while (curr_index != RLB_NULL_INDEX) { |
| 857 | struct rlb_client_info *curr = &(bond_info->rx_hashtbl[curr_index]); |
| 858 | u32 next_index = bond_info->rx_hashtbl[curr_index].next; |
| 859 | u32 prev_index = bond_info->rx_hashtbl[curr_index].prev; |
| 860 | |
| 861 | if (curr->tag && (curr->vlan_id == vlan_id)) { |
| 862 | if (curr_index == bond_info->rx_hashtbl_head) { |
| 863 | bond_info->rx_hashtbl_head = next_index; |
| 864 | } |
| 865 | if (prev_index != RLB_NULL_INDEX) { |
| 866 | bond_info->rx_hashtbl[prev_index].next = next_index; |
| 867 | } |
| 868 | if (next_index != RLB_NULL_INDEX) { |
| 869 | bond_info->rx_hashtbl[next_index].prev = prev_index; |
| 870 | } |
| 871 | |
| 872 | rlb_init_table_entry(curr); |
| 873 | } |
| 874 | |
| 875 | curr_index = next_index; |
| 876 | } |
| 877 | |
| 878 | _unlock_rx_hashtbl(bond); |
| 879 | } |
| 880 | |
| 881 | /*********************** tlb/rlb shared functions *********************/ |
| 882 | |
| 883 | static void alb_send_learning_packets(struct slave *slave, u8 mac_addr[]) |
| 884 | { |
| 885 | struct bonding *bond = bond_get_bond_by_slave(slave); |
| 886 | struct learning_pkt pkt; |
| 887 | int size = sizeof(struct learning_pkt); |
| 888 | int i; |
| 889 | |
| 890 | memset(&pkt, 0, size); |
| 891 | memcpy(pkt.mac_dst, mac_addr, ETH_ALEN); |
| 892 | memcpy(pkt.mac_src, mac_addr, ETH_ALEN); |
Harvey Harrison | 09640e6 | 2009-02-01 00:45:17 -0800 | [diff] [blame] | 893 | pkt.type = cpu_to_be16(ETH_P_LOOP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | |
| 895 | for (i = 0; i < MAX_LP_BURST; i++) { |
| 896 | struct sk_buff *skb; |
| 897 | char *data; |
| 898 | |
| 899 | skb = dev_alloc_skb(size); |
| 900 | if (!skb) { |
| 901 | return; |
| 902 | } |
| 903 | |
| 904 | data = skb_put(skb, size); |
| 905 | memcpy(data, &pkt, size); |
| 906 | |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 907 | skb_reset_mac_header(skb); |
Arnaldo Carvalho de Melo | b0e380b | 2007-04-10 21:21:55 -0700 | [diff] [blame] | 908 | skb->network_header = skb->mac_header + ETH_HLEN; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 909 | skb->protocol = pkt.type; |
| 910 | skb->priority = TC_PRIO_CONTROL; |
| 911 | skb->dev = slave->dev; |
| 912 | |
| 913 | if (!list_empty(&bond->vlan_list)) { |
| 914 | struct vlan_entry *vlan; |
| 915 | |
| 916 | vlan = bond_next_vlan(bond, |
| 917 | bond->alb_info.current_alb_vlan); |
| 918 | |
| 919 | bond->alb_info.current_alb_vlan = vlan; |
| 920 | if (!vlan) { |
| 921 | kfree_skb(skb); |
| 922 | continue; |
| 923 | } |
| 924 | |
| 925 | skb = vlan_put_tag(skb, vlan->vlan_id); |
| 926 | if (!skb) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 927 | pr_err("%s: Error: failed to insert VLAN tag\n", |
Mitch Williams | 4e0952c | 2005-11-09 10:34:57 -0800 | [diff] [blame] | 928 | bond->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 929 | continue; |
| 930 | } |
| 931 | } |
| 932 | |
| 933 | dev_queue_xmit(skb); |
| 934 | } |
| 935 | } |
| 936 | |
| 937 | /* hw is a boolean parameter that determines whether we should try and |
| 938 | * set the hw address of the device as well as the hw address of the |
| 939 | * net_device |
| 940 | */ |
| 941 | static int alb_set_slave_mac_addr(struct slave *slave, u8 addr[], int hw) |
| 942 | { |
| 943 | struct net_device *dev = slave->dev; |
| 944 | struct sockaddr s_addr; |
| 945 | |
| 946 | if (!hw) { |
| 947 | memcpy(dev->dev_addr, addr, dev->addr_len); |
| 948 | return 0; |
| 949 | } |
| 950 | |
| 951 | /* for rlb each slave must have a unique hw mac addresses so that */ |
| 952 | /* each slave will receive packets destined to a different mac */ |
| 953 | memcpy(s_addr.sa_data, addr, dev->addr_len); |
| 954 | s_addr.sa_family = dev->type; |
| 955 | if (dev_set_mac_address(dev, &s_addr)) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 956 | pr_err("%s: Error: dev_set_mac_address of dev %s failed!\n" |
| 957 | "ALB mode requires that the base driver support setting the hw address also when the network device's interface is open\n", |
Mitch Williams | 4e0952c | 2005-11-09 10:34:57 -0800 | [diff] [blame] | 958 | dev->master->name, dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 959 | return -EOPNOTSUPP; |
| 960 | } |
| 961 | return 0; |
| 962 | } |
| 963 | |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 964 | /* |
| 965 | * Swap MAC addresses between two slaves. |
| 966 | * |
| 967 | * Called with RTNL held, and no other locks. |
| 968 | * |
| 969 | */ |
| 970 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | static void alb_swap_mac_addr(struct bonding *bond, struct slave *slave1, struct slave *slave2) |
| 972 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 973 | u8 tmp_mac_addr[ETH_ALEN]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 974 | |
| 975 | memcpy(tmp_mac_addr, slave1->dev->dev_addr, ETH_ALEN); |
| 976 | alb_set_slave_mac_addr(slave1, slave2->dev->dev_addr, bond->alb_info.rlb_enabled); |
| 977 | alb_set_slave_mac_addr(slave2, tmp_mac_addr, bond->alb_info.rlb_enabled); |
| 978 | |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 979 | } |
| 980 | |
| 981 | /* |
| 982 | * Send learning packets after MAC address swap. |
| 983 | * |
Jay Vosburgh | 2543331 | 2008-01-17 16:24:59 -0800 | [diff] [blame] | 984 | * Called with RTNL and no other locks |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 985 | */ |
| 986 | static void alb_fasten_mac_swap(struct bonding *bond, struct slave *slave1, |
| 987 | struct slave *slave2) |
| 988 | { |
| 989 | int slaves_state_differ = (SLAVE_IS_OK(slave1) != SLAVE_IS_OK(slave2)); |
| 990 | struct slave *disabled_slave = NULL; |
| 991 | |
Jay Vosburgh | 2543331 | 2008-01-17 16:24:59 -0800 | [diff] [blame] | 992 | ASSERT_RTNL(); |
| 993 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 994 | /* fasten the change in the switch */ |
| 995 | if (SLAVE_IS_OK(slave1)) { |
| 996 | alb_send_learning_packets(slave1, slave1->dev->dev_addr); |
| 997 | if (bond->alb_info.rlb_enabled) { |
| 998 | /* inform the clients that the mac address |
| 999 | * has changed |
| 1000 | */ |
| 1001 | rlb_req_update_slave_clients(bond, slave1); |
| 1002 | } |
| 1003 | } else { |
| 1004 | disabled_slave = slave1; |
| 1005 | } |
| 1006 | |
| 1007 | if (SLAVE_IS_OK(slave2)) { |
| 1008 | alb_send_learning_packets(slave2, slave2->dev->dev_addr); |
| 1009 | if (bond->alb_info.rlb_enabled) { |
| 1010 | /* inform the clients that the mac address |
| 1011 | * has changed |
| 1012 | */ |
| 1013 | rlb_req_update_slave_clients(bond, slave2); |
| 1014 | } |
| 1015 | } else { |
| 1016 | disabled_slave = slave2; |
| 1017 | } |
| 1018 | |
| 1019 | if (bond->alb_info.rlb_enabled && slaves_state_differ) { |
| 1020 | /* A disabled slave was assigned an active mac addr */ |
| 1021 | rlb_teach_disabled_mac_on_primary(bond, |
| 1022 | disabled_slave->dev->dev_addr); |
| 1023 | } |
| 1024 | } |
| 1025 | |
| 1026 | /** |
| 1027 | * alb_change_hw_addr_on_detach |
| 1028 | * @bond: bonding we're working on |
| 1029 | * @slave: the slave that was just detached |
| 1030 | * |
| 1031 | * We assume that @slave was already detached from the slave list. |
| 1032 | * |
| 1033 | * If @slave's permanent hw address is different both from its current |
| 1034 | * address and from @bond's address, then somewhere in the bond there's |
| 1035 | * a slave that has @slave's permanet address as its current address. |
| 1036 | * We'll make sure that that slave no longer uses @slave's permanent address. |
| 1037 | * |
Jay Vosburgh | 2543331 | 2008-01-17 16:24:59 -0800 | [diff] [blame] | 1038 | * Caller must hold RTNL and no other locks |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1039 | */ |
| 1040 | static void alb_change_hw_addr_on_detach(struct bonding *bond, struct slave *slave) |
| 1041 | { |
| 1042 | int perm_curr_diff; |
| 1043 | int perm_bond_diff; |
| 1044 | |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1045 | perm_curr_diff = compare_ether_addr_64bits(slave->perm_hwaddr, |
| 1046 | slave->dev->dev_addr); |
| 1047 | perm_bond_diff = compare_ether_addr_64bits(slave->perm_hwaddr, |
| 1048 | bond->dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1049 | |
| 1050 | if (perm_curr_diff && perm_bond_diff) { |
| 1051 | struct slave *tmp_slave; |
| 1052 | int i, found = 0; |
| 1053 | |
| 1054 | bond_for_each_slave(bond, tmp_slave, i) { |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1055 | if (!compare_ether_addr_64bits(slave->perm_hwaddr, |
| 1056 | tmp_slave->dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1057 | found = 1; |
| 1058 | break; |
| 1059 | } |
| 1060 | } |
| 1061 | |
| 1062 | if (found) { |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1063 | /* locking: needs RTNL and nothing else */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1064 | alb_swap_mac_addr(bond, slave, tmp_slave); |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1065 | alb_fasten_mac_swap(bond, slave, tmp_slave); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1066 | } |
| 1067 | } |
| 1068 | } |
| 1069 | |
| 1070 | /** |
| 1071 | * alb_handle_addr_collision_on_attach |
| 1072 | * @bond: bonding we're working on |
| 1073 | * @slave: the slave that was just attached |
| 1074 | * |
| 1075 | * checks uniqueness of slave's mac address and handles the case the |
| 1076 | * new slave uses the bonds mac address. |
| 1077 | * |
| 1078 | * If the permanent hw address of @slave is @bond's hw address, we need to |
| 1079 | * find a different hw address to give @slave, that isn't in use by any other |
| 1080 | * slave in the bond. This address must be, of course, one of the premanent |
| 1081 | * addresses of the other slaves. |
| 1082 | * |
| 1083 | * We go over the slave list, and for each slave there we compare its |
| 1084 | * permanent hw address with the current address of all the other slaves. |
| 1085 | * If no match was found, then we've found a slave with a permanent address |
| 1086 | * that isn't used by any other slave in the bond, so we can assign it to |
| 1087 | * @slave. |
| 1088 | * |
| 1089 | * assumption: this function is called before @slave is attached to the |
| 1090 | * bond slave list. |
| 1091 | * |
| 1092 | * caller must hold the bond lock for write since the mac addresses are compared |
| 1093 | * and may be swapped. |
| 1094 | */ |
| 1095 | static int alb_handle_addr_collision_on_attach(struct bonding *bond, struct slave *slave) |
| 1096 | { |
| 1097 | struct slave *tmp_slave1, *tmp_slave2, *free_mac_slave; |
| 1098 | struct slave *has_bond_addr = bond->curr_active_slave; |
| 1099 | int i, j, found = 0; |
| 1100 | |
| 1101 | if (bond->slave_cnt == 0) { |
| 1102 | /* this is the first slave */ |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
| 1106 | /* if slave's mac address differs from bond's mac address |
| 1107 | * check uniqueness of slave's mac address against the other |
| 1108 | * slaves in the bond. |
| 1109 | */ |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1110 | if (compare_ether_addr_64bits(slave->perm_hwaddr, bond->dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1111 | bond_for_each_slave(bond, tmp_slave1, i) { |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1112 | if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr, |
| 1113 | slave->dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1114 | found = 1; |
| 1115 | break; |
| 1116 | } |
| 1117 | } |
| 1118 | |
John W. Linville | 6b38aef | 2005-07-28 15:00:15 -0400 | [diff] [blame] | 1119 | if (!found) |
| 1120 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | |
John W. Linville | 6b38aef | 2005-07-28 15:00:15 -0400 | [diff] [blame] | 1122 | /* Try setting slave mac to bond address and fall-through |
| 1123 | to code handling that situation below... */ |
| 1124 | alb_set_slave_mac_addr(slave, bond->dev->dev_addr, |
| 1125 | bond->alb_info.rlb_enabled); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | } |
| 1127 | |
| 1128 | /* The slave's address is equal to the address of the bond. |
| 1129 | * Search for a spare address in the bond for this slave. |
| 1130 | */ |
| 1131 | free_mac_slave = NULL; |
| 1132 | |
| 1133 | bond_for_each_slave(bond, tmp_slave1, i) { |
| 1134 | found = 0; |
| 1135 | bond_for_each_slave(bond, tmp_slave2, j) { |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1136 | if (!compare_ether_addr_64bits(tmp_slave1->perm_hwaddr, |
| 1137 | tmp_slave2->dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | found = 1; |
| 1139 | break; |
| 1140 | } |
| 1141 | } |
| 1142 | |
| 1143 | if (!found) { |
| 1144 | /* no slave has tmp_slave1's perm addr |
| 1145 | * as its curr addr |
| 1146 | */ |
| 1147 | free_mac_slave = tmp_slave1; |
| 1148 | break; |
| 1149 | } |
| 1150 | |
| 1151 | if (!has_bond_addr) { |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1152 | if (!compare_ether_addr_64bits(tmp_slave1->dev->dev_addr, |
| 1153 | bond->dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | |
| 1155 | has_bond_addr = tmp_slave1; |
| 1156 | } |
| 1157 | } |
| 1158 | } |
| 1159 | |
| 1160 | if (free_mac_slave) { |
| 1161 | alb_set_slave_mac_addr(slave, free_mac_slave->perm_hwaddr, |
| 1162 | bond->alb_info.rlb_enabled); |
| 1163 | |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 1164 | pr_warning("%s: Warning: the hw address of slave %s is in use by the bond; giving it the hw address of %s\n", |
Jiri Pirko | e5e2a8f | 2009-08-13 04:11:52 +0000 | [diff] [blame] | 1165 | bond->dev->name, slave->dev->name, |
| 1166 | free_mac_slave->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1167 | |
| 1168 | } else if (has_bond_addr) { |
Joe Perches | a4aee5c | 2009-12-13 20:06:07 -0800 | [diff] [blame^] | 1169 | 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", |
Mitch Williams | 4e0952c | 2005-11-09 10:34:57 -0800 | [diff] [blame] | 1170 | bond->dev->name, slave->dev->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1171 | return -EFAULT; |
| 1172 | } |
| 1173 | |
| 1174 | return 0; |
| 1175 | } |
| 1176 | |
| 1177 | /** |
| 1178 | * alb_set_mac_address |
| 1179 | * @bond: |
| 1180 | * @addr: |
| 1181 | * |
| 1182 | * In TLB mode all slaves are configured to the bond's hw address, but set |
| 1183 | * their dev_addr field to different addresses (based on their permanent hw |
| 1184 | * addresses). |
| 1185 | * |
| 1186 | * For each slave, this function sets the interface to the new address and then |
| 1187 | * changes its dev_addr field to its previous value. |
| 1188 | * |
| 1189 | * Unwinding assumes bond's mac address has not yet changed. |
| 1190 | */ |
| 1191 | static int alb_set_mac_address(struct bonding *bond, void *addr) |
| 1192 | { |
| 1193 | struct sockaddr sa; |
| 1194 | struct slave *slave, *stop_at; |
| 1195 | char tmp_addr[ETH_ALEN]; |
| 1196 | int res; |
| 1197 | int i; |
| 1198 | |
| 1199 | if (bond->alb_info.rlb_enabled) { |
| 1200 | return 0; |
| 1201 | } |
| 1202 | |
| 1203 | bond_for_each_slave(bond, slave, i) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1204 | /* save net_device's current hw address */ |
| 1205 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); |
| 1206 | |
| 1207 | res = dev_set_mac_address(slave->dev, addr); |
| 1208 | |
| 1209 | /* restore net_device's hw address */ |
| 1210 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); |
| 1211 | |
Stephen Hemminger | eb7cc59 | 2008-11-19 21:56:05 -0800 | [diff] [blame] | 1212 | if (res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1213 | goto unwind; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1214 | } |
| 1215 | |
| 1216 | return 0; |
| 1217 | |
| 1218 | unwind: |
| 1219 | memcpy(sa.sa_data, bond->dev->dev_addr, bond->dev->addr_len); |
| 1220 | sa.sa_family = bond->dev->type; |
| 1221 | |
| 1222 | /* unwind from head to the slave that failed */ |
| 1223 | stop_at = slave; |
| 1224 | bond_for_each_slave_from_to(bond, slave, i, bond->first_slave, stop_at) { |
| 1225 | memcpy(tmp_addr, slave->dev->dev_addr, ETH_ALEN); |
| 1226 | dev_set_mac_address(slave->dev, &sa); |
| 1227 | memcpy(slave->dev->dev_addr, tmp_addr, ETH_ALEN); |
| 1228 | } |
| 1229 | |
| 1230 | return res; |
| 1231 | } |
| 1232 | |
| 1233 | /************************ exported alb funcions ************************/ |
| 1234 | |
| 1235 | int bond_alb_initialize(struct bonding *bond, int rlb_enabled) |
| 1236 | { |
| 1237 | int res; |
| 1238 | |
| 1239 | res = tlb_initialize(bond); |
| 1240 | if (res) { |
| 1241 | return res; |
| 1242 | } |
| 1243 | |
| 1244 | if (rlb_enabled) { |
| 1245 | bond->alb_info.rlb_enabled = 1; |
| 1246 | /* initialize rlb */ |
| 1247 | res = rlb_initialize(bond); |
| 1248 | if (res) { |
| 1249 | tlb_deinitialize(bond); |
| 1250 | return res; |
| 1251 | } |
Mitch Williams | b76850a | 2005-11-09 10:35:35 -0800 | [diff] [blame] | 1252 | } else { |
| 1253 | bond->alb_info.rlb_enabled = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1254 | } |
| 1255 | |
| 1256 | return 0; |
| 1257 | } |
| 1258 | |
| 1259 | void bond_alb_deinitialize(struct bonding *bond) |
| 1260 | { |
| 1261 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 1262 | |
| 1263 | tlb_deinitialize(bond); |
| 1264 | |
| 1265 | if (bond_info->rlb_enabled) { |
| 1266 | rlb_deinitialize(bond); |
| 1267 | } |
| 1268 | } |
| 1269 | |
| 1270 | int bond_alb_xmit(struct sk_buff *skb, struct net_device *bond_dev) |
| 1271 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 1272 | struct bonding *bond = netdev_priv(bond_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1273 | struct ethhdr *eth_data; |
| 1274 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 1275 | struct slave *tx_slave = NULL; |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 1276 | static const __be32 ip_bcast = htonl(0xffffffff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1277 | int hash_size = 0; |
| 1278 | int do_tx_balance = 1; |
| 1279 | u32 hash_index = 0; |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1280 | const u8 *hash_start = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | int res = 1; |
Vlad Yasevich | 2d1ea19 | 2008-08-28 15:38:41 -0400 | [diff] [blame] | 1282 | struct ipv6hdr *ip6hdr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1283 | |
Arnaldo Carvalho de Melo | 459a98e | 2007-03-19 15:30:44 -0700 | [diff] [blame] | 1284 | skb_reset_mac_header(skb); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1285 | eth_data = eth_hdr(skb); |
| 1286 | |
| 1287 | /* make sure that the curr_active_slave and the slaves list do |
| 1288 | * not change during tx |
| 1289 | */ |
| 1290 | read_lock(&bond->lock); |
| 1291 | read_lock(&bond->curr_slave_lock); |
| 1292 | |
| 1293 | if (!BOND_IS_OK(bond)) { |
| 1294 | goto out; |
| 1295 | } |
| 1296 | |
| 1297 | switch (ntohs(skb->protocol)) { |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1298 | case ETH_P_IP: { |
| 1299 | const struct iphdr *iph = ip_hdr(skb); |
| 1300 | |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1301 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast) || |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1302 | (iph->daddr == ip_bcast) || |
| 1303 | (iph->protocol == IPPROTO_IGMP)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1304 | do_tx_balance = 0; |
| 1305 | break; |
| 1306 | } |
Arnaldo Carvalho de Melo | eddc9ec | 2007-04-20 22:47:35 -0700 | [diff] [blame] | 1307 | hash_start = (char *)&(iph->daddr); |
| 1308 | hash_size = sizeof(iph->daddr); |
| 1309 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1310 | break; |
| 1311 | case ETH_P_IPV6: |
Vlad Yasevich | 2d1ea19 | 2008-08-28 15:38:41 -0400 | [diff] [blame] | 1312 | /* IPv6 doesn't really use broadcast mac address, but leave |
| 1313 | * that here just in case. |
| 1314 | */ |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1315 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_bcast)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1316 | do_tx_balance = 0; |
| 1317 | break; |
| 1318 | } |
| 1319 | |
Vlad Yasevich | 2d1ea19 | 2008-08-28 15:38:41 -0400 | [diff] [blame] | 1320 | /* IPv6 uses all-nodes multicast as an equivalent to |
| 1321 | * broadcasts in IPv4. |
| 1322 | */ |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1323 | if (!compare_ether_addr_64bits(eth_data->h_dest, mac_v6_allmcast)) { |
Vlad Yasevich | 2d1ea19 | 2008-08-28 15:38:41 -0400 | [diff] [blame] | 1324 | do_tx_balance = 0; |
| 1325 | break; |
| 1326 | } |
| 1327 | |
| 1328 | /* Additianally, DAD probes should not be tx-balanced as that |
| 1329 | * will lead to false positives for duplicate addresses and |
| 1330 | * prevent address configuration from working. |
| 1331 | */ |
| 1332 | ip6hdr = ipv6_hdr(skb); |
| 1333 | if (ipv6_addr_any(&ip6hdr->saddr)) { |
| 1334 | do_tx_balance = 0; |
| 1335 | break; |
| 1336 | } |
| 1337 | |
Arnaldo Carvalho de Melo | 0660e03 | 2007-04-25 17:54:47 -0700 | [diff] [blame] | 1338 | hash_start = (char *)&(ipv6_hdr(skb)->daddr); |
| 1339 | hash_size = sizeof(ipv6_hdr(skb)->daddr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1340 | break; |
| 1341 | case ETH_P_IPX: |
Al Viro | d3bb52b | 2007-08-22 20:06:58 -0400 | [diff] [blame] | 1342 | if (ipx_hdr(skb)->ipx_checksum != IPX_NO_CHECKSUM) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | /* something is wrong with this packet */ |
| 1344 | do_tx_balance = 0; |
| 1345 | break; |
| 1346 | } |
| 1347 | |
| 1348 | if (ipx_hdr(skb)->ipx_type != IPX_TYPE_NCP) { |
| 1349 | /* The only protocol worth balancing in |
| 1350 | * this family since it has an "ARP" like |
| 1351 | * mechanism |
| 1352 | */ |
| 1353 | do_tx_balance = 0; |
| 1354 | break; |
| 1355 | } |
| 1356 | |
| 1357 | hash_start = (char*)eth_data->h_dest; |
| 1358 | hash_size = ETH_ALEN; |
| 1359 | break; |
| 1360 | case ETH_P_ARP: |
| 1361 | do_tx_balance = 0; |
| 1362 | if (bond_info->rlb_enabled) { |
| 1363 | tx_slave = rlb_arp_xmit(skb, bond); |
| 1364 | } |
| 1365 | break; |
| 1366 | default: |
| 1367 | do_tx_balance = 0; |
| 1368 | break; |
| 1369 | } |
| 1370 | |
| 1371 | if (do_tx_balance) { |
| 1372 | hash_index = _simple_hash(hash_start, hash_size); |
| 1373 | tx_slave = tlb_choose_channel(bond, hash_index, skb->len); |
| 1374 | } |
| 1375 | |
| 1376 | if (!tx_slave) { |
| 1377 | /* unbalanced or unassigned, send through primary */ |
| 1378 | tx_slave = bond->curr_active_slave; |
| 1379 | bond_info->unbalanced_load += skb->len; |
| 1380 | } |
| 1381 | |
| 1382 | if (tx_slave && SLAVE_IS_OK(tx_slave)) { |
| 1383 | if (tx_slave != bond->curr_active_slave) { |
| 1384 | memcpy(eth_data->h_source, |
| 1385 | tx_slave->dev->dev_addr, |
| 1386 | ETH_ALEN); |
| 1387 | } |
| 1388 | |
| 1389 | res = bond_dev_queue_xmit(bond, skb, tx_slave->dev); |
| 1390 | } else { |
| 1391 | if (tx_slave) { |
| 1392 | tlb_clear_slave(bond, tx_slave, 0); |
| 1393 | } |
| 1394 | } |
| 1395 | |
| 1396 | out: |
| 1397 | if (res) { |
| 1398 | /* no suitable interface, frame not sent */ |
| 1399 | dev_kfree_skb(skb); |
| 1400 | } |
| 1401 | read_unlock(&bond->curr_slave_lock); |
| 1402 | read_unlock(&bond->lock); |
Patrick McHardy | ec634fe | 2009-07-05 19:23:38 -0700 | [diff] [blame] | 1403 | return NETDEV_TX_OK; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | } |
| 1405 | |
Jay Vosburgh | 1b76b31 | 2007-10-17 17:37:45 -0700 | [diff] [blame] | 1406 | void bond_alb_monitor(struct work_struct *work) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | { |
Jay Vosburgh | 1b76b31 | 2007-10-17 17:37:45 -0700 | [diff] [blame] | 1408 | struct bonding *bond = container_of(work, struct bonding, |
| 1409 | alb_work.work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1410 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 1411 | struct slave *slave; |
| 1412 | int i; |
| 1413 | |
| 1414 | read_lock(&bond->lock); |
| 1415 | |
| 1416 | if (bond->kill_timers) { |
| 1417 | goto out; |
| 1418 | } |
| 1419 | |
| 1420 | if (bond->slave_cnt == 0) { |
| 1421 | bond_info->tx_rebalance_counter = 0; |
| 1422 | bond_info->lp_counter = 0; |
| 1423 | goto re_arm; |
| 1424 | } |
| 1425 | |
| 1426 | bond_info->tx_rebalance_counter++; |
| 1427 | bond_info->lp_counter++; |
| 1428 | |
| 1429 | /* send learning packets */ |
| 1430 | if (bond_info->lp_counter >= BOND_ALB_LP_TICKS) { |
| 1431 | /* change of curr_active_slave involves swapping of mac addresses. |
| 1432 | * in order to avoid this swapping from happening while |
| 1433 | * sending the learning packets, the curr_slave_lock must be held for |
| 1434 | * read. |
| 1435 | */ |
| 1436 | read_lock(&bond->curr_slave_lock); |
| 1437 | |
| 1438 | bond_for_each_slave(bond, slave, i) { |
Mitch Williams | e944ef7 | 2005-11-09 10:36:50 -0800 | [diff] [blame] | 1439 | alb_send_learning_packets(slave, slave->dev->dev_addr); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1440 | } |
| 1441 | |
| 1442 | read_unlock(&bond->curr_slave_lock); |
| 1443 | |
| 1444 | bond_info->lp_counter = 0; |
| 1445 | } |
| 1446 | |
| 1447 | /* rebalance tx traffic */ |
| 1448 | if (bond_info->tx_rebalance_counter >= BOND_TLB_REBALANCE_TICKS) { |
| 1449 | |
| 1450 | read_lock(&bond->curr_slave_lock); |
| 1451 | |
| 1452 | bond_for_each_slave(bond, slave, i) { |
| 1453 | tlb_clear_slave(bond, slave, 1); |
| 1454 | if (slave == bond->curr_active_slave) { |
| 1455 | SLAVE_TLB_INFO(slave).load = |
| 1456 | bond_info->unbalanced_load / |
| 1457 | BOND_TLB_REBALANCE_INTERVAL; |
| 1458 | bond_info->unbalanced_load = 0; |
| 1459 | } |
| 1460 | } |
| 1461 | |
| 1462 | read_unlock(&bond->curr_slave_lock); |
| 1463 | |
| 1464 | bond_info->tx_rebalance_counter = 0; |
| 1465 | } |
| 1466 | |
| 1467 | /* handle rlb stuff */ |
| 1468 | if (bond_info->rlb_enabled) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1469 | if (bond_info->primary_is_promisc && |
| 1470 | (++bond_info->rlb_promisc_timeout_counter >= RLB_PROMISC_TIMEOUT)) { |
| 1471 | |
Jay Vosburgh | d0e81b7 | 2007-10-17 17:37:51 -0700 | [diff] [blame] | 1472 | /* |
| 1473 | * dev_set_promiscuity requires rtnl and |
| 1474 | * nothing else. |
| 1475 | */ |
| 1476 | read_unlock(&bond->lock); |
| 1477 | rtnl_lock(); |
| 1478 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1479 | bond_info->rlb_promisc_timeout_counter = 0; |
| 1480 | |
| 1481 | /* If the primary was set to promiscuous mode |
| 1482 | * because a slave was disabled then |
| 1483 | * it can now leave promiscuous mode. |
| 1484 | */ |
| 1485 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); |
| 1486 | bond_info->primary_is_promisc = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | |
Jay Vosburgh | d0e81b7 | 2007-10-17 17:37:51 -0700 | [diff] [blame] | 1488 | rtnl_unlock(); |
| 1489 | read_lock(&bond->lock); |
| 1490 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | |
| 1492 | if (bond_info->rlb_rebalance) { |
| 1493 | bond_info->rlb_rebalance = 0; |
| 1494 | rlb_rebalance(bond); |
| 1495 | } |
| 1496 | |
| 1497 | /* check if clients need updating */ |
| 1498 | if (bond_info->rx_ntt) { |
| 1499 | if (bond_info->rlb_update_delay_counter) { |
| 1500 | --bond_info->rlb_update_delay_counter; |
| 1501 | } else { |
| 1502 | rlb_update_rx_clients(bond); |
| 1503 | if (bond_info->rlb_update_retry_counter) { |
| 1504 | --bond_info->rlb_update_retry_counter; |
| 1505 | } else { |
| 1506 | bond_info->rx_ntt = 0; |
| 1507 | } |
| 1508 | } |
| 1509 | } |
| 1510 | } |
| 1511 | |
| 1512 | re_arm: |
Jay Vosburgh | 1b76b31 | 2007-10-17 17:37:45 -0700 | [diff] [blame] | 1513 | queue_delayed_work(bond->wq, &bond->alb_work, alb_delta_in_ticks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | out: |
| 1515 | read_unlock(&bond->lock); |
| 1516 | } |
| 1517 | |
| 1518 | /* assumption: called before the slave is attached to the bond |
| 1519 | * and not locked by the bond lock |
| 1520 | */ |
| 1521 | int bond_alb_init_slave(struct bonding *bond, struct slave *slave) |
| 1522 | { |
| 1523 | int res; |
| 1524 | |
| 1525 | res = alb_set_slave_mac_addr(slave, slave->perm_hwaddr, |
| 1526 | bond->alb_info.rlb_enabled); |
| 1527 | if (res) { |
| 1528 | return res; |
| 1529 | } |
| 1530 | |
| 1531 | /* caller must hold the bond lock for write since the mac addresses |
| 1532 | * are compared and may be swapped. |
| 1533 | */ |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 1534 | read_lock(&bond->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | |
| 1536 | res = alb_handle_addr_collision_on_attach(bond, slave); |
| 1537 | |
Jay Vosburgh | 6603a6f | 2007-10-17 17:37:50 -0700 | [diff] [blame] | 1538 | read_unlock(&bond->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1539 | |
| 1540 | if (res) { |
| 1541 | return res; |
| 1542 | } |
| 1543 | |
| 1544 | tlb_init_slave(slave); |
| 1545 | |
| 1546 | /* order a rebalance ASAP */ |
| 1547 | bond->alb_info.tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; |
| 1548 | |
| 1549 | if (bond->alb_info.rlb_enabled) { |
| 1550 | bond->alb_info.rlb_rebalance = 1; |
| 1551 | } |
| 1552 | |
| 1553 | return 0; |
| 1554 | } |
| 1555 | |
Jay Vosburgh | 2543331 | 2008-01-17 16:24:59 -0800 | [diff] [blame] | 1556 | /* |
| 1557 | * Remove slave from tlb and rlb hash tables, and fix up MAC addresses |
| 1558 | * if necessary. |
| 1559 | * |
| 1560 | * Caller must hold RTNL and no other locks |
| 1561 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1562 | void bond_alb_deinit_slave(struct bonding *bond, struct slave *slave) |
| 1563 | { |
| 1564 | if (bond->slave_cnt > 1) { |
| 1565 | alb_change_hw_addr_on_detach(bond, slave); |
| 1566 | } |
| 1567 | |
| 1568 | tlb_clear_slave(bond, slave, 0); |
| 1569 | |
| 1570 | if (bond->alb_info.rlb_enabled) { |
| 1571 | bond->alb_info.next_rx_slave = NULL; |
| 1572 | rlb_clear_slave(bond, slave); |
| 1573 | } |
| 1574 | } |
| 1575 | |
| 1576 | /* Caller must hold bond lock for read */ |
| 1577 | void bond_alb_handle_link_change(struct bonding *bond, struct slave *slave, char link) |
| 1578 | { |
| 1579 | struct alb_bond_info *bond_info = &(BOND_ALB_INFO(bond)); |
| 1580 | |
| 1581 | if (link == BOND_LINK_DOWN) { |
| 1582 | tlb_clear_slave(bond, slave, 0); |
| 1583 | if (bond->alb_info.rlb_enabled) { |
| 1584 | rlb_clear_slave(bond, slave); |
| 1585 | } |
| 1586 | } else if (link == BOND_LINK_UP) { |
| 1587 | /* order a rebalance ASAP */ |
| 1588 | bond_info->tx_rebalance_counter = BOND_TLB_REBALANCE_TICKS; |
| 1589 | if (bond->alb_info.rlb_enabled) { |
| 1590 | bond->alb_info.rlb_rebalance = 1; |
| 1591 | /* If the updelay module parameter is smaller than the |
| 1592 | * forwarding delay of the switch the rebalance will |
| 1593 | * not work because the rebalance arp replies will |
| 1594 | * not be forwarded to the clients.. |
| 1595 | */ |
| 1596 | } |
| 1597 | } |
| 1598 | } |
| 1599 | |
| 1600 | /** |
| 1601 | * bond_alb_handle_active_change - assign new curr_active_slave |
| 1602 | * @bond: our bonding struct |
| 1603 | * @new_slave: new slave to assign |
| 1604 | * |
| 1605 | * Set the bond->curr_active_slave to @new_slave and handle |
| 1606 | * mac address swapping and promiscuity changes as needed. |
| 1607 | * |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1608 | * If new_slave is NULL, caller must hold curr_slave_lock or |
| 1609 | * bond->lock for write. |
| 1610 | * |
| 1611 | * If new_slave is not NULL, caller must hold RTNL, bond->lock for |
| 1612 | * read and curr_slave_lock for write. Processing here may sleep, so |
| 1613 | * no other locks may be held. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1614 | */ |
| 1615 | void bond_alb_handle_active_change(struct bonding *bond, struct slave *new_slave) |
Hannes Eder | 1f78d9f | 2009-02-14 11:15:33 +0000 | [diff] [blame] | 1616 | __releases(&bond->curr_slave_lock) |
| 1617 | __releases(&bond->lock) |
| 1618 | __acquires(&bond->lock) |
| 1619 | __acquires(&bond->curr_slave_lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1620 | { |
| 1621 | struct slave *swap_slave; |
| 1622 | int i; |
| 1623 | |
| 1624 | if (bond->curr_active_slave == new_slave) { |
| 1625 | return; |
| 1626 | } |
| 1627 | |
| 1628 | if (bond->curr_active_slave && bond->alb_info.primary_is_promisc) { |
| 1629 | dev_set_promiscuity(bond->curr_active_slave->dev, -1); |
| 1630 | bond->alb_info.primary_is_promisc = 0; |
| 1631 | bond->alb_info.rlb_promisc_timeout_counter = 0; |
| 1632 | } |
| 1633 | |
| 1634 | swap_slave = bond->curr_active_slave; |
| 1635 | bond->curr_active_slave = new_slave; |
| 1636 | |
| 1637 | if (!new_slave || (bond->slave_cnt == 0)) { |
| 1638 | return; |
| 1639 | } |
| 1640 | |
| 1641 | /* set the new curr_active_slave to the bonds mac address |
| 1642 | * i.e. swap mac addresses of old curr_active_slave and new curr_active_slave |
| 1643 | */ |
| 1644 | if (!swap_slave) { |
| 1645 | struct slave *tmp_slave; |
| 1646 | /* find slave that is holding the bond's mac address */ |
| 1647 | bond_for_each_slave(bond, tmp_slave, i) { |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1648 | if (!compare_ether_addr_64bits(tmp_slave->dev->dev_addr, |
| 1649 | bond->dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1650 | swap_slave = tmp_slave; |
| 1651 | break; |
| 1652 | } |
| 1653 | } |
| 1654 | } |
| 1655 | |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1656 | /* |
| 1657 | * Arrange for swap_slave and new_slave to temporarily be |
| 1658 | * ignored so we can mess with their MAC addresses without |
| 1659 | * fear of interference from transmit activity. |
| 1660 | */ |
| 1661 | if (swap_slave) { |
| 1662 | tlb_clear_slave(bond, swap_slave, 1); |
| 1663 | } |
| 1664 | tlb_clear_slave(bond, new_slave, 1); |
| 1665 | |
| 1666 | write_unlock_bh(&bond->curr_slave_lock); |
| 1667 | read_unlock(&bond->lock); |
| 1668 | |
Jay Vosburgh | e0138a6 | 2008-01-17 16:24:58 -0800 | [diff] [blame] | 1669 | ASSERT_RTNL(); |
| 1670 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1671 | /* curr_active_slave must be set before calling alb_swap_mac_addr */ |
| 1672 | if (swap_slave) { |
| 1673 | /* swap mac address */ |
| 1674 | alb_swap_mac_addr(bond, swap_slave, new_slave); |
| 1675 | } else { |
| 1676 | /* set the new_slave to the bond mac address */ |
| 1677 | alb_set_slave_mac_addr(new_slave, bond->dev->dev_addr, |
| 1678 | bond->alb_info.rlb_enabled); |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1679 | } |
| 1680 | |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1681 | if (swap_slave) { |
| 1682 | alb_fasten_mac_swap(bond, swap_slave, new_slave); |
Jay Vosburgh | 2543331 | 2008-01-17 16:24:59 -0800 | [diff] [blame] | 1683 | read_lock(&bond->lock); |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1684 | } else { |
Jay Vosburgh | 2543331 | 2008-01-17 16:24:59 -0800 | [diff] [blame] | 1685 | read_lock(&bond->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1686 | alb_send_learning_packets(new_slave, bond->dev->dev_addr); |
| 1687 | } |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1688 | |
| 1689 | write_lock_bh(&bond->curr_slave_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1690 | } |
| 1691 | |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1692 | /* |
| 1693 | * Called with RTNL |
| 1694 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1695 | int bond_alb_set_mac_address(struct net_device *bond_dev, void *addr) |
Hannes Eder | 1f78d9f | 2009-02-14 11:15:33 +0000 | [diff] [blame] | 1696 | __acquires(&bond->lock) |
Jay Vosburgh | 815bcc2 | 2009-05-04 09:03:37 +0000 | [diff] [blame] | 1697 | __releases(&bond->lock) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1698 | { |
Wang Chen | 454d7c9 | 2008-11-12 23:37:49 -0800 | [diff] [blame] | 1699 | struct bonding *bond = netdev_priv(bond_dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1700 | struct sockaddr *sa = addr; |
| 1701 | struct slave *slave, *swap_slave; |
| 1702 | int res; |
| 1703 | int i; |
| 1704 | |
| 1705 | if (!is_valid_ether_addr(sa->sa_data)) { |
| 1706 | return -EADDRNOTAVAIL; |
| 1707 | } |
| 1708 | |
| 1709 | res = alb_set_mac_address(bond, addr); |
| 1710 | if (res) { |
| 1711 | return res; |
| 1712 | } |
| 1713 | |
| 1714 | memcpy(bond_dev->dev_addr, sa->sa_data, bond_dev->addr_len); |
| 1715 | |
| 1716 | /* If there is no curr_active_slave there is nothing else to do. |
| 1717 | * Otherwise we'll need to pass the new address to it and handle |
| 1718 | * duplications. |
| 1719 | */ |
| 1720 | if (!bond->curr_active_slave) { |
| 1721 | return 0; |
| 1722 | } |
| 1723 | |
| 1724 | swap_slave = NULL; |
| 1725 | |
| 1726 | bond_for_each_slave(bond, slave, i) { |
Eric Dumazet | 885a136 | 2009-09-01 06:31:18 +0000 | [diff] [blame] | 1727 | if (!compare_ether_addr_64bits(slave->dev->dev_addr, |
| 1728 | bond_dev->dev_addr)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | swap_slave = slave; |
| 1730 | break; |
| 1731 | } |
| 1732 | } |
| 1733 | |
| 1734 | if (swap_slave) { |
| 1735 | alb_swap_mac_addr(bond, swap_slave, bond->curr_active_slave); |
Jay Vosburgh | 059fe7a | 2007-10-17 17:37:49 -0700 | [diff] [blame] | 1736 | alb_fasten_mac_swap(bond, swap_slave, bond->curr_active_slave); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1737 | } else { |
| 1738 | alb_set_slave_mac_addr(bond->curr_active_slave, bond_dev->dev_addr, |
| 1739 | bond->alb_info.rlb_enabled); |
| 1740 | |
Jay Vosburgh | 815bcc2 | 2009-05-04 09:03:37 +0000 | [diff] [blame] | 1741 | read_lock(&bond->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1742 | alb_send_learning_packets(bond->curr_active_slave, bond_dev->dev_addr); |
| 1743 | if (bond->alb_info.rlb_enabled) { |
| 1744 | /* inform clients mac address has changed */ |
| 1745 | rlb_req_update_slave_clients(bond, bond->curr_active_slave); |
| 1746 | } |
Jay Vosburgh | 815bcc2 | 2009-05-04 09:03:37 +0000 | [diff] [blame] | 1747 | read_unlock(&bond->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1748 | } |
| 1749 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1750 | return 0; |
| 1751 | } |
| 1752 | |
| 1753 | void bond_alb_clear_vlan(struct bonding *bond, unsigned short vlan_id) |
| 1754 | { |
| 1755 | if (bond->alb_info.current_alb_vlan && |
| 1756 | (bond->alb_info.current_alb_vlan->vlan_id == vlan_id)) { |
| 1757 | bond->alb_info.current_alb_vlan = NULL; |
| 1758 | } |
| 1759 | |
| 1760 | if (bond->alb_info.rlb_enabled) { |
| 1761 | rlb_clear_vlan(bond, vlan_id); |
| 1762 | } |
| 1763 | } |
| 1764 | |