/* * Bond several ethernet interfaces into a Cisco, running 'Etherchannel'. * * Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes * NCM: Network and Communications Management, Inc. * * BUT, I'm the one who modified it for ethernet, so: * (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov * * This software may be used and distributed according to the terms * of the GNU Public License, incorporated herein by reference. * * * 2003/03/18 - Amir Noam , * Tsippy Mendelson and * Shmulik Hen * - Added support for IEEE 802.3ad Dynamic link aggregation mode. * * 2003/05/01 - Tsippy Mendelson and * Amir Noam * - Code beautification and style changes (mainly in comments). * * 2003/05/01 - Shmulik Hen * - Added support for Transmit load balancing mode. * * 2003/12/01 - Shmulik Hen * - Code cleanup and style changes * * 2005/05/05 - Jason Gabler * - added "xmit_policy" kernel parameter for alternate hashing policy * support for mode 2 */ #ifndef _LINUX_BONDING_H #define _LINUX_BONDING_H #include #include #include #include "bond_3ad.h" #include "bond_alb.h" #define DRV_VERSION "2.6.5" #define DRV_RELDATE "November 4, 2005" #define DRV_NAME "bonding" #define DRV_DESCRIPTION "Ethernet Channel Bonding Driver" #define BOND_MAX_ARP_TARGETS 16 #ifdef BONDING_DEBUG #define dprintk(fmt, args...) \ printk(KERN_DEBUG \ DRV_NAME ": %s() %d: " fmt, __FUNCTION__, __LINE__ , ## args ) #else #define dprintk(fmt, args...) #endif /* BONDING_DEBUG */ #define IS_UP(dev) \ ((((dev)->flags & IFF_UP) == IFF_UP) && \ netif_running(dev) && \ netif_carrier_ok(dev)) /* * Checks whether bond is ready for transmit. * * Caller must hold bond->lock */ #define BOND_IS_OK(bond) \ (((bond)->dev->flags & IFF_UP) && \ netif_running((bond)->dev) && \ ((bond)->slave_cnt > 0)) /* * Checks whether slave is ready for transmit. */ #define SLAVE_IS_OK(slave) \ (((slave)->dev->flags & IFF_UP) && \ netif_running((slave)->dev) && \ ((slave)->link == BOND_LINK_UP) && \ ((slave)->state == BOND_STATE_ACTIVE)) #define USES_PRIMARY(mode) \ (((mode) == BOND_MODE_ACTIVEBACKUP) || \ ((mode) == BOND_MODE_TLB) || \ ((mode) == BOND_MODE_ALB)) /* * Less bad way to call ioctl from within the kernel; this needs to be * done some other way to get the call out of interrupt context. * Needs "ioctl" variable to be supplied by calling context. */ #define IOCTL(dev, arg, cmd) ({ \ int res = 0; \ mm_segment_t fs = get_fs(); \ set_fs(get_ds()); \ res = ioctl(dev, arg, cmd); \ set_fs(fs); \ res; }) /** * bond_for_each_slave_from - iterate the slaves list from a starting point * @bond: the bond holding this list. * @pos: current slave. * @cnt: counter for max number of moves * @start: starting point. * * Caller must hold bond->lock */ #define bond_for_each_slave_from(bond, pos, cnt, start) \ for (cnt = 0, pos = start; \ cnt < (bond)->slave_cnt; \ cnt++, pos = (pos)->next) /** * bond_for_each_slave_from_to - iterate the slaves list from start point to stop point * @bond: the bond holding this list. * @pos: current slave. * @cnt: counter for number max of moves * @start: start point. * @stop: stop point. * * Caller must hold bond->lock */ #define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \ for (cnt = 0, pos = start; \ ((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \ cnt++, pos = (pos)->next) /** * bond_for_each_slave - iterate the slaves list from head * @bond: the bond holding this list. * @pos: current slave. * @cnt: counter for max number of moves * * Caller must hold bond->lock */ #define bond_for_each_slave(bond, pos, cnt) \ bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave) struct bond_params { int mode; int xmit_policy; int miimon; int arp_interval; int use_carrier; int updelay; int downdelay; int lacp_fast; char primary[IFNAMSIZ]; u32 arp_targets[BOND_MAX_ARP_TARGETS]; }; struct bond_parm_tbl { char *modename; int mode; }; struct vlan_entry { struct list_head vlan_list; u32 vlan_ip; unsigned short vlan_id; }; struct slave { struct net_device *dev; /* first - usefull for panic debug */ struct slave *next; struct slave *prev; s16 delay; u32 jiffies; s8 link; /* one of BOND_LINK_XXXX */ s8 state; /* one of BOND_STATE_XXXX */ u32 original_flags; u32 link_failure_count; u16 speed; u8 duplex; u8 perm_hwaddr[ETH_ALEN]; struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */ struct tlb_slave_info tlb_info; }; /* * Here are the locking policies for the two bonding locks: * * 1) Get bond->lock when reading/writing slave list. * 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave. * (It is unnecessary when the write-lock is put with bond->lock.) * 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock * beforehand. */ struct bonding { struct net_device *dev; /* first - usefull for panic debug */ struct slave *first_slave; struct slave *curr_active_slave; struct slave *current_arp_slave; struct slave *primary_slave; s32 slave_cnt; /* never change this value outside the attach/detach wrappers */ rwlock_t lock; rwlock_t curr_slave_lock; struct timer_list mii_timer; struct timer_list arp_timer; s8 kill_timers; struct net_device_stats stats; #ifdef CONFIG_PROC_FS struct proc_dir_entry *proc_entry; char proc_file_name[IFNAMSIZ]; #endif /* CONFIG_PROC_FS */ struct list_head bond_list; struct dev_mc_list *mc_list; int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int); u32 master_ip; u16 flags; struct ad_bond_info ad_info; struct alb_bond_info alb_info; struct bond_params params; struct list_head vlan_list; struct vlan_group *vlgrp; }; /** * Returns NULL if the net_device does not belong to any of the bond's slaves * * Caller must hold bond lock for read */ extern inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev) { struct slave *slave = NULL; int i; bond_for_each_slave(bond, slave, i) { if (slave->dev == slave_dev) { break; } } return slave; } extern inline struct bonding *bond_get_bond_by_slave(struct slave *slave) { if (!slave || !slave->dev->master) { return NULL; } return (struct bonding *)slave->dev->master->priv; } extern inline void bond_set_slave_inactive_flags(struct slave *slave) { slave->state = BOND_STATE_BACKUP; slave->dev->flags |= IFF_NOARP; } extern inline void bond_set_slave_active_flags(struct slave *slave) { slave->state = BOND_STATE_ACTIVE; slave->dev->flags &= ~IFF_NOARP; } struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr); int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev); int bond_create(char *name, struct bond_params *params, struct bonding **newbond); void bond_deinit(struct net_device *bond_dev); int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev); int bond_release(struct net_device *bond_dev, struct net_device *slave_dev); int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev); void bond_mii_monitor(struct net_device *bond_dev); void bond_loadbalance_arp_mon(struct net_device *bond_dev); void bond_activebackup_arp_mon(struct net_device *bond_dev); void bond_set_mode_ops(struct bonding *bond, int mode); int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl); const char *bond_mode_name(int mode); void bond_select_active_slave(struct bonding *bond); void bond_change_active_slave(struct bonding *bond, struct slave *new_active); #endif /* _LINUX_BONDING_H */