385 lines
11 KiB
C
385 lines
11 KiB
C
/*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef _LINUX_BONDING_H
|
|
#define _LINUX_BONDING_H
|
|
|
|
#include <linux/timer.h>
|
|
#include <linux/proc_fs.h>
|
|
#include <linux/if_bonding.h>
|
|
#include <linux/kobject.h>
|
|
#include <linux/in6.h>
|
|
#include "bond_3ad.h"
|
|
#include "bond_alb.h"
|
|
|
|
#define DRV_VERSION "3.6.0"
|
|
#define DRV_RELDATE "September 26, 2009"
|
|
#define DRV_NAME "bonding"
|
|
#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
|
|
|
|
#define BOND_MAX_ARP_TARGETS 16
|
|
|
|
#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 num_grat_arp;
|
|
int num_unsol_na;
|
|
int arp_interval;
|
|
int arp_validate;
|
|
int use_carrier;
|
|
int fail_over_mac;
|
|
int updelay;
|
|
int downdelay;
|
|
int lacp_fast;
|
|
int ad_select;
|
|
char primary[IFNAMSIZ];
|
|
int primary_reselect;
|
|
__be32 arp_targets[BOND_MAX_ARP_TARGETS];
|
|
};
|
|
|
|
struct bond_parm_tbl {
|
|
char *modename;
|
|
int mode;
|
|
};
|
|
|
|
#define BOND_MAX_MODENAME_LEN 20
|
|
|
|
struct vlan_entry {
|
|
struct list_head vlan_list;
|
|
__be32 vlan_ip;
|
|
unsigned short vlan_id;
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
struct in6_addr vlan_ipv6;
|
|
#endif
|
|
};
|
|
|
|
struct slave {
|
|
struct net_device *dev; /* first - useful for panic debug */
|
|
struct slave *next;
|
|
struct slave *prev;
|
|
int delay;
|
|
unsigned long jiffies;
|
|
unsigned long last_arp_rx;
|
|
s8 link; /* one of BOND_LINK_XXXX */
|
|
s8 new_link;
|
|
s8 state; /* one of BOND_STATE_XXXX */
|
|
u32 original_flags;
|
|
u32 original_mtu;
|
|
u32 link_failure_count;
|
|
u8 perm_hwaddr[ETH_ALEN];
|
|
u16 speed;
|
|
u8 duplex;
|
|
struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
|
|
struct tlb_slave_info tlb_info;
|
|
};
|
|
|
|
/*
|
|
* Link pseudo-state only used internally by monitors
|
|
*/
|
|
#define BOND_LINK_NOCHANGE -1
|
|
|
|
/*
|
|
* 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 - useful for panic debug */
|
|
struct slave *first_slave;
|
|
struct slave *curr_active_slave;
|
|
struct slave *current_arp_slave;
|
|
struct slave *primary_slave;
|
|
bool force_primary;
|
|
s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
|
|
rwlock_t lock;
|
|
rwlock_t curr_slave_lock;
|
|
s8 kill_timers;
|
|
s8 send_grat_arp;
|
|
s8 send_unsol_na;
|
|
s8 setup_by_slave;
|
|
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 *, int);
|
|
__be32 master_ip;
|
|
u16 flags;
|
|
u16 rr_tx_counter;
|
|
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;
|
|
struct packet_type arp_mon_pt;
|
|
struct workqueue_struct *wq;
|
|
struct delayed_work mii_work;
|
|
struct delayed_work arp_work;
|
|
struct delayed_work alb_work;
|
|
struct delayed_work ad_work;
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
struct in6_addr master_ipv6;
|
|
#endif
|
|
};
|
|
|
|
/**
|
|
* Returns NULL if the net_device does not belong to any of the bond's slaves
|
|
*
|
|
* Caller must hold bond lock for read
|
|
*/
|
|
static 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;
|
|
}
|
|
|
|
static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
|
|
{
|
|
if (!slave || !slave->dev->master) {
|
|
return NULL;
|
|
}
|
|
|
|
return (struct bonding *)netdev_priv(slave->dev->master);
|
|
}
|
|
|
|
static inline bool bond_is_lb(const struct bonding *bond)
|
|
{
|
|
return (bond->params.mode == BOND_MODE_TLB ||
|
|
bond->params.mode == BOND_MODE_ALB);
|
|
}
|
|
|
|
#define BOND_PRI_RESELECT_ALWAYS 0
|
|
#define BOND_PRI_RESELECT_BETTER 1
|
|
#define BOND_PRI_RESELECT_FAILURE 2
|
|
|
|
#define BOND_FOM_NONE 0
|
|
#define BOND_FOM_ACTIVE 1
|
|
#define BOND_FOM_FOLLOW 2
|
|
|
|
#define BOND_ARP_VALIDATE_NONE 0
|
|
#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
|
|
#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
|
|
#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE | \
|
|
BOND_ARP_VALIDATE_BACKUP)
|
|
|
|
static inline int slave_do_arp_validate(struct bonding *bond,
|
|
struct slave *slave)
|
|
{
|
|
return bond->params.arp_validate & (1 << slave->state);
|
|
}
|
|
|
|
static inline unsigned long slave_last_rx(struct bonding *bond,
|
|
struct slave *slave)
|
|
{
|
|
if (slave_do_arp_validate(bond, slave))
|
|
return slave->last_arp_rx;
|
|
|
|
return slave->dev->last_rx;
|
|
}
|
|
|
|
static inline void bond_set_slave_inactive_flags(struct slave *slave)
|
|
{
|
|
struct bonding *bond = netdev_priv(slave->dev->master);
|
|
if (!bond_is_lb(bond))
|
|
slave->state = BOND_STATE_BACKUP;
|
|
slave->dev->priv_flags |= IFF_SLAVE_INACTIVE;
|
|
if (slave_do_arp_validate(bond, slave))
|
|
slave->dev->priv_flags |= IFF_SLAVE_NEEDARP;
|
|
}
|
|
|
|
static inline void bond_set_slave_active_flags(struct slave *slave)
|
|
{
|
|
slave->state = BOND_STATE_ACTIVE;
|
|
slave->dev->priv_flags &= ~(IFF_SLAVE_INACTIVE | IFF_SLAVE_NEEDARP);
|
|
}
|
|
|
|
static inline void bond_set_master_3ad_flags(struct bonding *bond)
|
|
{
|
|
bond->dev->priv_flags |= IFF_MASTER_8023AD;
|
|
}
|
|
|
|
static inline void bond_unset_master_3ad_flags(struct bonding *bond)
|
|
{
|
|
bond->dev->priv_flags &= ~IFF_MASTER_8023AD;
|
|
}
|
|
|
|
static inline void bond_set_master_alb_flags(struct bonding *bond)
|
|
{
|
|
bond->dev->priv_flags |= IFF_MASTER_ALB;
|
|
}
|
|
|
|
static inline void bond_unset_master_alb_flags(struct bonding *bond)
|
|
{
|
|
bond->dev->priv_flags &= ~IFF_MASTER_ALB;
|
|
}
|
|
|
|
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(struct net *net, const char *name);
|
|
int bond_release_and_destroy(struct net_device *bond_dev, struct net_device *slave_dev);
|
|
int bond_create_sysfs(void);
|
|
void bond_destroy_sysfs(void);
|
|
void bond_prepare_sysfs_group(struct bonding *bond);
|
|
int bond_create_slave_symlinks(struct net_device *master, struct net_device *slave);
|
|
void bond_destroy_slave_symlinks(struct net_device *master, struct net_device *slave);
|
|
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);
|
|
void bond_mii_monitor(struct work_struct *);
|
|
void bond_loadbalance_arp_mon(struct work_struct *);
|
|
void bond_activebackup_arp_mon(struct work_struct *);
|
|
void bond_set_mode_ops(struct bonding *bond, int mode);
|
|
int bond_parse_parm(const char *mode_arg, const struct bond_parm_tbl *tbl);
|
|
void bond_select_active_slave(struct bonding *bond);
|
|
void bond_change_active_slave(struct bonding *bond, struct slave *new_active);
|
|
void bond_register_arp(struct bonding *);
|
|
void bond_unregister_arp(struct bonding *);
|
|
|
|
struct bond_net {
|
|
struct net * net; /* Associated network namespace */
|
|
struct list_head dev_list;
|
|
#ifdef CONFIG_PROC_FS
|
|
struct proc_dir_entry * proc_dir;
|
|
#endif
|
|
};
|
|
|
|
/* exported from bond_main.c */
|
|
extern int bond_net_id;
|
|
extern const struct bond_parm_tbl bond_lacp_tbl[];
|
|
extern const struct bond_parm_tbl bond_mode_tbl[];
|
|
extern const struct bond_parm_tbl xmit_hashtype_tbl[];
|
|
extern const struct bond_parm_tbl arp_validate_tbl[];
|
|
extern const struct bond_parm_tbl fail_over_mac_tbl[];
|
|
extern const struct bond_parm_tbl pri_reselect_tbl[];
|
|
extern struct bond_parm_tbl ad_select_tbl[];
|
|
|
|
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
|
|
void bond_send_unsolicited_na(struct bonding *bond);
|
|
void bond_register_ipv6_notifier(void);
|
|
void bond_unregister_ipv6_notifier(void);
|
|
#else
|
|
static inline void bond_send_unsolicited_na(struct bonding *bond)
|
|
{
|
|
return;
|
|
}
|
|
static inline void bond_register_ipv6_notifier(void)
|
|
{
|
|
return;
|
|
}
|
|
static inline void bond_unregister_ipv6_notifier(void)
|
|
{
|
|
return;
|
|
}
|
|
#endif
|
|
|
|
#endif /* _LINUX_BONDING_H */
|