383 lines
11 KiB
C
383 lines
11 KiB
C
/*
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* Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
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*
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* Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
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* NCM: Network and Communications Management, Inc.
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*
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* BUT, I'm the one who modified it for ethernet, so:
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* (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
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*
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* This software may be used and distributed according to the terms
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* of the GNU Public License, incorporated herein by reference.
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*
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*/
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#ifndef _LINUX_BONDING_H
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#define _LINUX_BONDING_H
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#include <linux/timer.h>
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#include <linux/proc_fs.h>
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#include <linux/if_bonding.h>
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#include <linux/kobject.h>
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#include <linux/in6.h>
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#include "bond_3ad.h"
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#include "bond_alb.h"
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#define DRV_VERSION "3.5.0"
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#define DRV_RELDATE "November 4, 2008"
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#define DRV_NAME "bonding"
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#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
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#define BOND_MAX_ARP_TARGETS 16
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extern struct list_head bond_dev_list;
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#ifdef BONDING_DEBUG
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#define dprintk(fmt, args...) \
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printk(KERN_DEBUG \
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DRV_NAME ": %s() %d: " fmt, __func__, __LINE__ , ## args )
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#else
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#define dprintk(fmt, args...)
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#endif /* BONDING_DEBUG */
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#define IS_UP(dev) \
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((((dev)->flags & IFF_UP) == IFF_UP) && \
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netif_running(dev) && \
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netif_carrier_ok(dev))
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/*
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* Checks whether bond is ready for transmit.
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*
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* Caller must hold bond->lock
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*/
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#define BOND_IS_OK(bond) \
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(((bond)->dev->flags & IFF_UP) && \
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netif_running((bond)->dev) && \
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((bond)->slave_cnt > 0))
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/*
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* Checks whether slave is ready for transmit.
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*/
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#define SLAVE_IS_OK(slave) \
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(((slave)->dev->flags & IFF_UP) && \
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netif_running((slave)->dev) && \
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((slave)->link == BOND_LINK_UP) && \
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((slave)->state == BOND_STATE_ACTIVE))
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#define USES_PRIMARY(mode) \
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(((mode) == BOND_MODE_ACTIVEBACKUP) || \
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((mode) == BOND_MODE_TLB) || \
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((mode) == BOND_MODE_ALB))
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/*
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* Less bad way to call ioctl from within the kernel; this needs to be
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* done some other way to get the call out of interrupt context.
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* Needs "ioctl" variable to be supplied by calling context.
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*/
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#define IOCTL(dev, arg, cmd) ({ \
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int res = 0; \
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mm_segment_t fs = get_fs(); \
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set_fs(get_ds()); \
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res = ioctl(dev, arg, cmd); \
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set_fs(fs); \
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res; })
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/**
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* bond_for_each_slave_from - iterate the slaves list from a starting point
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* @bond: the bond holding this list.
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* @pos: current slave.
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* @cnt: counter for max number of moves
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* @start: starting point.
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*
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* Caller must hold bond->lock
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*/
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#define bond_for_each_slave_from(bond, pos, cnt, start) \
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for (cnt = 0, pos = start; \
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cnt < (bond)->slave_cnt; \
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cnt++, pos = (pos)->next)
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/**
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* bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
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* @bond: the bond holding this list.
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* @pos: current slave.
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* @cnt: counter for number max of moves
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* @start: start point.
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* @stop: stop point.
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*
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* Caller must hold bond->lock
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*/
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#define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
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for (cnt = 0, pos = start; \
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((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
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cnt++, pos = (pos)->next)
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/**
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* bond_for_each_slave - iterate the slaves list from head
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* @bond: the bond holding this list.
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* @pos: current slave.
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* @cnt: counter for max number of moves
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*
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* Caller must hold bond->lock
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*/
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#define bond_for_each_slave(bond, pos, cnt) \
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bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
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struct bond_params {
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int mode;
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int xmit_policy;
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int miimon;
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int num_grat_arp;
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int num_unsol_na;
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int arp_interval;
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int arp_validate;
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int use_carrier;
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int fail_over_mac;
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int updelay;
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int downdelay;
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int lacp_fast;
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int ad_select;
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char primary[IFNAMSIZ];
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__be32 arp_targets[BOND_MAX_ARP_TARGETS];
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};
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struct bond_parm_tbl {
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char *modename;
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int mode;
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};
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#define BOND_MAX_MODENAME_LEN 20
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struct vlan_entry {
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struct list_head vlan_list;
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__be32 vlan_ip;
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unsigned short vlan_id;
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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struct in6_addr vlan_ipv6;
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#endif
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};
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struct slave {
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struct net_device *dev; /* first - useful for panic debug */
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struct slave *next;
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struct slave *prev;
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int delay;
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unsigned long jiffies;
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unsigned long last_arp_rx;
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s8 link; /* one of BOND_LINK_XXXX */
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s8 new_link;
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s8 state; /* one of BOND_STATE_XXXX */
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u32 original_flags;
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u32 original_mtu;
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u32 link_failure_count;
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u16 speed;
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u8 duplex;
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u8 perm_hwaddr[ETH_ALEN];
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struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
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struct tlb_slave_info tlb_info;
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};
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/*
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* Link pseudo-state only used internally by monitors
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*/
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#define BOND_LINK_NOCHANGE -1
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/*
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* Here are the locking policies for the two bonding locks:
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*
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* 1) Get bond->lock when reading/writing slave list.
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* 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
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* (It is unnecessary when the write-lock is put with bond->lock.)
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* 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
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* beforehand.
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*/
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struct bonding {
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struct net_device *dev; /* first - useful for panic debug */
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struct slave *first_slave;
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struct slave *curr_active_slave;
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struct slave *current_arp_slave;
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struct slave *primary_slave;
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s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
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rwlock_t lock;
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rwlock_t curr_slave_lock;
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s8 kill_timers;
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s8 send_grat_arp;
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s8 send_unsol_na;
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s8 setup_by_slave;
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struct net_device_stats stats;
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#ifdef CONFIG_PROC_FS
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struct proc_dir_entry *proc_entry;
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char proc_file_name[IFNAMSIZ];
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#endif /* CONFIG_PROC_FS */
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struct list_head bond_list;
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struct dev_mc_list *mc_list;
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int (*xmit_hash_policy)(struct sk_buff *, struct net_device *, int);
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__be32 master_ip;
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u16 flags;
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u16 rr_tx_counter;
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struct ad_bond_info ad_info;
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struct alb_bond_info alb_info;
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struct bond_params params;
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struct list_head vlan_list;
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struct vlan_group *vlgrp;
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struct packet_type arp_mon_pt;
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struct workqueue_struct *wq;
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struct delayed_work mii_work;
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struct delayed_work arp_work;
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struct delayed_work alb_work;
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struct delayed_work ad_work;
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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struct in6_addr master_ipv6;
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#endif
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};
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/**
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* Returns NULL if the net_device does not belong to any of the bond's slaves
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*
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* Caller must hold bond lock for read
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*/
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static inline struct slave *bond_get_slave_by_dev(struct bonding *bond, struct net_device *slave_dev)
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{
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struct slave *slave = NULL;
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int i;
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bond_for_each_slave(bond, slave, i) {
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if (slave->dev == slave_dev) {
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break;
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}
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}
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return slave;
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}
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static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
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{
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if (!slave || !slave->dev->master) {
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return NULL;
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}
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return (struct bonding *)netdev_priv(slave->dev->master);
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}
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static inline bool bond_is_lb(const struct bonding *bond)
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{
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return bond->params.mode == BOND_MODE_TLB
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|| bond->params.mode == BOND_MODE_ALB;
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}
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#define BOND_FOM_NONE 0
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#define BOND_FOM_ACTIVE 1
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#define BOND_FOM_FOLLOW 2
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#define BOND_ARP_VALIDATE_NONE 0
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#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
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#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
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#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
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BOND_ARP_VALIDATE_BACKUP)
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static inline int slave_do_arp_validate(struct bonding *bond,
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struct slave *slave)
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{
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return bond->params.arp_validate & (1 << slave->state);
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}
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static inline unsigned long slave_last_rx(struct bonding *bond,
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struct slave *slave)
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{
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if (slave_do_arp_validate(bond, slave))
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return slave->last_arp_rx;
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return slave->dev->last_rx;
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}
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static inline void bond_set_slave_inactive_flags(struct slave *slave)
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{
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struct bonding *bond = netdev_priv(slave->dev->master);
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if (bond->params.mode != BOND_MODE_TLB &&
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bond->params.mode != BOND_MODE_ALB)
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slave->state = BOND_STATE_BACKUP;
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slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
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if (slave_do_arp_validate(bond, slave))
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slave->dev->priv_flags |= IFF_SLAVE_NEEDARP;
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}
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static inline void bond_set_slave_active_flags(struct slave *slave)
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{
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slave->state = BOND_STATE_ACTIVE;
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slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP);
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}
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static inline void bond_set_master_3ad_flags(struct bonding *bond)
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{
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bond->dev->priv_flags |= IFF_MASTER_8023AD;
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}
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static inline void bond_unset_master_3ad_flags(struct bonding *bond)
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{
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bond->dev->priv_flags &= ~IFF_MASTER_8023AD;
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}
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static inline void bond_set_master_alb_flags(struct bonding *bond)
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{
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bond->dev->priv_flags |= IFF_MASTER_ALB;
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}
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static inline void bond_unset_master_alb_flags(struct bonding *bond)
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{
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bond->dev->priv_flags &= ~IFF_MASTER_ALB;
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}
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struct vlan_entry *bond_next_vlan(struct bonding *bond, struct vlan_entry *curr);
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int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
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int bond_create(char *name, struct bond_params *params);
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void bond_destroy(struct bonding *bond);
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int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev);
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int bond_create_sysfs(void);
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void bond_destroy_sysfs(void);
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void bond_destroy_sysfs_entry(struct bonding *bond);
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int bond_create_sysfs_entry(struct bonding *bond);
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int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
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void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
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int bond_enslave(struct net_device *bond_dev, struct net_device *slave_dev);
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int bond_release(struct net_device *bond_dev, struct net_device *slave_dev);
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void bond_mii_monitor(struct work_struct *);
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void bond_loadbalance_arp_mon(struct work_struct *);
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void bond_activebackup_arp_mon(struct work_struct *);
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void bond_set_mode_ops(struct bonding *bond, int mode);
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int bond_parse_parm(const char *mode_arg, struct bond_parm_tbl *tbl);
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void bond_select_active_slave(struct bonding *bond);
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void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
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void bond_register_arp(struct bonding *);
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void bond_unregister_arp(struct bonding *);
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/* exported from bond_main.c */
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extern struct list_head bond_dev_list;
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extern struct bond_parm_tbl bond_lacp_tbl[];
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extern struct bond_parm_tbl bond_mode_tbl[];
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extern struct bond_parm_tbl xmit_hashtype_tbl[];
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extern struct bond_parm_tbl arp_validate_tbl[];
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extern struct bond_parm_tbl fail_over_mac_tbl[];
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#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
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void bond_send_unsolicited_na(struct bonding *bond);
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void bond_register_ipv6_notifier(void);
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void bond_unregister_ipv6_notifier(void);
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#else
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static inline void bond_send_unsolicited_na(struct bonding *bond)
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{
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return;
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}
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static inline void bond_register_ipv6_notifier(void)
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{
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return;
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}
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static inline void bond_unregister_ipv6_notifier(void)
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{
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return;
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}
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#endif
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#endif /* _LINUX_BONDING_H */
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