Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'. |
| 3 | * |
| 4 | * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes |
| 5 | * NCM: Network and Communications Management, Inc. |
| 6 | * |
| 7 | * BUT, I'm the one who modified it for ethernet, so: |
| 8 | * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov |
| 9 | * |
| 10 | * This software may be used and distributed according to the terms |
| 11 | * of the GNU Public License, incorporated herein by reference. |
| 12 | * |
| 13 | * |
| 14 | * 2003/03/18 - Amir Noam <amir.noam at intel dot com>, |
| 15 | * Tsippy Mendelson <tsippy.mendelson at intel dot com> and |
| 16 | * Shmulik Hen <shmulik.hen at intel dot com> |
| 17 | * - Added support for IEEE 802.3ad Dynamic link aggregation mode. |
| 18 | * |
| 19 | * 2003/05/01 - Tsippy Mendelson <tsippy.mendelson at intel dot com> and |
| 20 | * Amir Noam <amir.noam at intel dot com> |
| 21 | * - Code beautification and style changes (mainly in comments). |
| 22 | * |
| 23 | * 2003/05/01 - Shmulik Hen <shmulik.hen at intel dot com> |
| 24 | * - Added support for Transmit load balancing mode. |
| 25 | * |
| 26 | * 2003/12/01 - Shmulik Hen <shmulik.hen at intel dot com> |
| 27 | * - Code cleanup and style changes |
| 28 | */ |
| 29 | |
| 30 | #ifndef _LINUX_BONDING_H |
| 31 | #define _LINUX_BONDING_H |
| 32 | |
| 33 | #include <linux/timer.h> |
| 34 | #include <linux/proc_fs.h> |
| 35 | #include <linux/if_bonding.h> |
| 36 | #include "bond_3ad.h" |
| 37 | #include "bond_alb.h" |
| 38 | |
Jay Vosburgh | c3ade5c | 2005-06-26 17:52:20 -0400 | [diff] [blame^] | 39 | #define DRV_VERSION "2.6.2" |
| 40 | #define DRV_RELDATE "June 5, 2005" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define DRV_NAME "bonding" |
| 42 | #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver" |
| 43 | |
| 44 | #define BOND_MAX_ARP_TARGETS 16 |
| 45 | |
| 46 | #ifdef BONDING_DEBUG |
| 47 | #define dprintk(fmt, args...) \ |
| 48 | printk(KERN_DEBUG \ |
| 49 | DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args ) |
| 50 | #else |
| 51 | #define dprintk(fmt, args...) |
| 52 | #endif /* BONDING_DEBUG */ |
| 53 | |
| 54 | #define IS_UP(dev) \ |
| 55 | ((((dev)->flags & IFF_UP) == IFF_UP) && \ |
| 56 | netif_running(dev) && \ |
| 57 | netif_carrier_ok(dev)) |
| 58 | |
| 59 | /* |
| 60 | * Checks whether bond is ready for transmit. |
| 61 | * |
| 62 | * Caller must hold bond->lock |
| 63 | */ |
| 64 | #define BOND_IS_OK(bond) \ |
| 65 | (((bond)->dev->flags & IFF_UP) && \ |
| 66 | netif_running((bond)->dev) && \ |
| 67 | ((bond)->slave_cnt > 0)) |
| 68 | |
| 69 | /* |
| 70 | * Checks whether slave is ready for transmit. |
| 71 | */ |
| 72 | #define SLAVE_IS_OK(slave) \ |
| 73 | (((slave)->dev->flags & IFF_UP) && \ |
| 74 | netif_running((slave)->dev) && \ |
| 75 | ((slave)->link == BOND_LINK_UP) && \ |
| 76 | ((slave)->state == BOND_STATE_ACTIVE)) |
| 77 | |
| 78 | |
| 79 | #define USES_PRIMARY(mode) \ |
| 80 | (((mode) == BOND_MODE_ACTIVEBACKUP) || \ |
| 81 | ((mode) == BOND_MODE_TLB) || \ |
| 82 | ((mode) == BOND_MODE_ALB)) |
| 83 | |
| 84 | /* |
| 85 | * Less bad way to call ioctl from within the kernel; this needs to be |
| 86 | * done some other way to get the call out of interrupt context. |
| 87 | * Needs "ioctl" variable to be supplied by calling context. |
| 88 | */ |
| 89 | #define IOCTL(dev, arg, cmd) ({ \ |
| 90 | int res = 0; \ |
| 91 | mm_segment_t fs = get_fs(); \ |
| 92 | set_fs(get_ds()); \ |
| 93 | res = ioctl(dev, arg, cmd); \ |
| 94 | set_fs(fs); \ |
| 95 | res; }) |
| 96 | |
| 97 | /** |
| 98 | * bond_for_each_slave_from - iterate the slaves list from a starting point |
| 99 | * @bond: the bond holding this list. |
| 100 | * @pos: current slave. |
| 101 | * @cnt: counter for max number of moves |
| 102 | * @start: starting point. |
| 103 | * |
| 104 | * Caller must hold bond->lock |
| 105 | */ |
| 106 | #define bond_for_each_slave_from(bond, pos, cnt, start) \ |
| 107 | for (cnt = 0, pos = start; \ |
| 108 | cnt < (bond)->slave_cnt; \ |
| 109 | cnt++, pos = (pos)->next) |
| 110 | |
| 111 | /** |
| 112 | * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point |
| 113 | * @bond: the bond holding this list. |
| 114 | * @pos: current slave. |
| 115 | * @cnt: counter for number max of moves |
| 116 | * @start: start point. |
| 117 | * @stop: stop point. |
| 118 | * |
| 119 | * Caller must hold bond->lock |
| 120 | */ |
| 121 | #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \ |
| 122 | for (cnt = 0, pos = start; \ |
| 123 | ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \ |
| 124 | cnt++, pos = (pos)->next) |
| 125 | |
| 126 | /** |
| 127 | * bond_for_each_slave - iterate the slaves list from head |
| 128 | * @bond: the bond holding this list. |
| 129 | * @pos: current slave. |
| 130 | * @cnt: counter for max number of moves |
| 131 | * |
| 132 | * Caller must hold bond->lock |
| 133 | */ |
| 134 | #define bond_for_each_slave(bond, pos, cnt) \ |
| 135 | bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave) |
| 136 | |
| 137 | |
| 138 | struct bond_params { |
| 139 | int mode; |
| 140 | int miimon; |
| 141 | int arp_interval; |
| 142 | int use_carrier; |
| 143 | int updelay; |
| 144 | int downdelay; |
| 145 | int lacp_fast; |
| 146 | char primary[IFNAMSIZ]; |
| 147 | u32 arp_targets[BOND_MAX_ARP_TARGETS]; |
| 148 | }; |
| 149 | |
| 150 | struct vlan_entry { |
| 151 | struct list_head vlan_list; |
Jay Vosburgh | c3ade5c | 2005-06-26 17:52:20 -0400 | [diff] [blame^] | 152 | u32 vlan_ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | unsigned short vlan_id; |
| 154 | }; |
| 155 | |
| 156 | struct slave { |
| 157 | struct net_device *dev; /* first - usefull for panic debug */ |
| 158 | struct slave *next; |
| 159 | struct slave *prev; |
| 160 | s16 delay; |
| 161 | u32 jiffies; |
| 162 | s8 link; /* one of BOND_LINK_XXXX */ |
| 163 | s8 state; /* one of BOND_STATE_XXXX */ |
| 164 | u32 original_flags; |
| 165 | u32 link_failure_count; |
| 166 | u16 speed; |
| 167 | u8 duplex; |
| 168 | u8 perm_hwaddr[ETH_ALEN]; |
| 169 | struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */ |
| 170 | struct tlb_slave_info tlb_info; |
| 171 | }; |
| 172 | |
| 173 | /* |
| 174 | * Here are the locking policies for the two bonding locks: |
| 175 | * |
| 176 | * 1) Get bond->lock when reading/writing slave list. |
| 177 | * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. |
| 178 | * (It is unnecessary when the write-lock is put with bond->lock.) |
| 179 | * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock |
| 180 | * beforehand. |
| 181 | */ |
| 182 | struct bonding { |
| 183 | struct net_device *dev; /* first - usefull for panic debug */ |
| 184 | struct slave *first_slave; |
| 185 | struct slave *curr_active_slave; |
| 186 | struct slave *current_arp_slave; |
| 187 | struct slave *primary_slave; |
| 188 | s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ |
| 189 | rwlock_t lock; |
| 190 | rwlock_t curr_slave_lock; |
| 191 | struct timer_list mii_timer; |
| 192 | struct timer_list arp_timer; |
| 193 | s8 kill_timers; |
| 194 | struct net_device_stats stats; |
| 195 | #ifdef CONFIG_PROC_FS |
| 196 | struct proc_dir_entry *proc_entry; |
| 197 | char proc_file_name[IFNAMSIZ]; |
| 198 | #endif /* CONFIG_PROC_FS */ |
| 199 | struct list_head bond_list; |
| 200 | struct dev_mc_list *mc_list; |
Jay Vosburgh | c3ade5c | 2005-06-26 17:52:20 -0400 | [diff] [blame^] | 201 | u32 master_ip; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 202 | u16 flags; |
| 203 | struct ad_bond_info ad_info; |
| 204 | struct alb_bond_info alb_info; |
| 205 | struct bond_params params; |
| 206 | struct list_head vlan_list; |
| 207 | struct vlan_group *vlgrp; |
| 208 | }; |
| 209 | |
| 210 | /** |
| 211 | * Returns NULL if the net_device does not belong to any of the bond's slaves |
| 212 | * |
| 213 | * Caller must hold bond lock for read |
| 214 | */ |
| 215 | extern inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) |
| 216 | { |
| 217 | struct slave *slave = NULL; |
| 218 | int i; |
| 219 | |
| 220 | bond_for_each_slave(bond, slave, i) { |
| 221 | if (slave->dev == slave_dev) { |
| 222 | break; |
| 223 | } |
| 224 | } |
| 225 | |
| 226 | return slave; |
| 227 | } |
| 228 | |
| 229 | extern inline struct bonding *bond_get_bond_by_slave(struct slave *slave) |
| 230 | { |
| 231 | if (!slave || !slave->dev->master) { |
| 232 | return NULL; |
| 233 | } |
| 234 | |
| 235 | return (struct bonding *)slave->dev->master->priv; |
| 236 | } |
| 237 | |
| 238 | extern inline void bond_set_slave_inactive_flags(struct slave *slave) |
| 239 | { |
| 240 | slave->state = BOND_STATE_BACKUP; |
| 241 | slave->dev->flags |= IFF_NOARP; |
| 242 | } |
| 243 | |
| 244 | extern inline void bond_set_slave_active_flags(struct slave *slave) |
| 245 | { |
| 246 | slave->state = BOND_STATE_ACTIVE; |
| 247 | slave->dev->flags &= ~IFF_NOARP; |
| 248 | } |
| 249 | |
| 250 | struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); |
| 251 | int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); |
| 252 | |
| 253 | #endif /* _LINUX_BONDING_H */ |
| 254 | |