forked from Minki/linux
ff59c4563a
Add support for the bonding master to specify its carrier state based upon the state of the slaves. For 802.3ad, the bond is up if there is an active, parterned aggregator. For other modes, the bond is up if any slaves are up. Updates driver version to 3.0.3. Based on a patch by jamal <hadi@cyberus.ca>. Signed-off-by: Jay Vosburgh <fubar@us.ibm.com> Signed-off-by: Jeff Garzik <jeff@garzik.org>
290 lines
8.2 KiB
C
290 lines
8.2 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 "bond_3ad.h"
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#include "bond_alb.h"
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#define DRV_VERSION "3.0.3"
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#define DRV_RELDATE "March 23, 2006"
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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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#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, __FUNCTION__, __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 arp_interval;
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int use_carrier;
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int updelay;
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int downdelay;
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int lacp_fast;
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char primary[IFNAMSIZ];
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u32 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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struct vlan_entry {
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struct list_head vlan_list;
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u32 vlan_ip;
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unsigned short vlan_id;
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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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s16 delay;
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u32 jiffies;
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s8 link; /* one of BOND_LINK_XXXX */
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s8 state; /* one of BOND_STATE_XXXX */
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u32 original_flags;
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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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* 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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struct timer_list mii_timer;
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struct timer_list arp_timer;
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s8 kill_timers;
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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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u32 master_ip;
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u16 flags;
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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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};
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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 *)slave->dev->master->priv;
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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 = slave->dev->master->priv;
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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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}
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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;
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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, struct bonding **newbond);
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void bond_deinit(struct net_device *bond_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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int bond_sethwaddr(struct net_device *bond_dev, struct net_device *slave_dev);
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void bond_mii_monitor(struct net_device *bond_dev);
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void bond_loadbalance_arp_mon(struct net_device *bond_dev);
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void bond_activebackup_arp_mon(struct net_device *bond_dev);
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void bond_set_mode_ops(struct bonding *bond, int mode);
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int bond_parse_parm(char *mode_arg, struct bond_parm_tbl *tbl);
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const char *bond_mode_name(int mode);
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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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#endif /* _LINUX_BONDING_H */
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