465 lines
12 KiB
C
465 lines
12 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/cpumask.h>
|
|
#include <linux/in6.h>
|
|
#include <linux/netpoll.h>
|
|
#include <linux/inetdevice.h>
|
|
#include "bond_3ad.h"
|
|
#include "bond_alb.h"
|
|
|
|
#define DRV_VERSION "3.7.1"
|
|
#define DRV_RELDATE "April 27, 2011"
|
|
#define DRV_NAME "bonding"
|
|
#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
|
|
|
|
#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
|
|
|
|
#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 slave is ready for transmit.
|
|
*/
|
|
#define SLAVE_IS_OK(slave) \
|
|
(((slave)->dev->flags & IFF_UP) && \
|
|
netif_running((slave)->dev) && \
|
|
((slave)->link == BOND_LINK_UP) && \
|
|
bond_is_active_slave(slave))
|
|
|
|
|
|
#define USES_PRIMARY(mode) \
|
|
(((mode) == BOND_MODE_ACTIVEBACKUP) || \
|
|
((mode) == BOND_MODE_TLB) || \
|
|
((mode) == BOND_MODE_ALB))
|
|
|
|
#define TX_QUEUE_OVERRIDE(mode) \
|
|
(((mode) == BOND_MODE_ACTIVEBACKUP) || \
|
|
((mode) == BOND_MODE_ROUNDROBIN))
|
|
/*
|
|
* 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)
|
|
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
extern atomic_t netpoll_block_tx;
|
|
|
|
static inline void block_netpoll_tx(void)
|
|
{
|
|
atomic_inc(&netpoll_block_tx);
|
|
}
|
|
|
|
static inline void unblock_netpoll_tx(void)
|
|
{
|
|
atomic_dec(&netpoll_block_tx);
|
|
}
|
|
|
|
static inline int is_netpoll_tx_blocked(struct net_device *dev)
|
|
{
|
|
if (unlikely(netpoll_tx_running(dev)))
|
|
return atomic_read(&netpoll_block_tx);
|
|
return 0;
|
|
}
|
|
#else
|
|
#define block_netpoll_tx()
|
|
#define unblock_netpoll_tx()
|
|
#define is_netpoll_tx_blocked(dev) (0)
|
|
#endif
|
|
|
|
struct bond_params {
|
|
int mode;
|
|
int xmit_policy;
|
|
int miimon;
|
|
u8 num_peer_notif;
|
|
int arp_interval;
|
|
int arp_validate;
|
|
int use_carrier;
|
|
int fail_over_mac;
|
|
int updelay;
|
|
int downdelay;
|
|
int lacp_fast;
|
|
unsigned int min_links;
|
|
int ad_select;
|
|
char primary[IFNAMSIZ];
|
|
int primary_reselect;
|
|
__be32 arp_targets[BOND_MAX_ARP_TARGETS];
|
|
int tx_queues;
|
|
int all_slaves_active;
|
|
int resend_igmp;
|
|
};
|
|
|
|
struct bond_parm_tbl {
|
|
char *modename;
|
|
int mode;
|
|
};
|
|
|
|
#define BOND_MAX_MODENAME_LEN 20
|
|
|
|
struct vlan_entry {
|
|
struct list_head vlan_list;
|
|
unsigned short vlan_id;
|
|
};
|
|
|
|
struct slave {
|
|
struct net_device *dev; /* first - useful for panic debug */
|
|
struct slave *next;
|
|
struct slave *prev;
|
|
struct bonding *bond; /* our master */
|
|
int delay;
|
|
unsigned long jiffies;
|
|
unsigned long last_arp_rx;
|
|
s8 link; /* one of BOND_LINK_XXXX */
|
|
s8 new_link;
|
|
u8 backup:1, /* indicates backup slave. Value corresponds with
|
|
BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
|
|
inactive:1; /* indicates inactive slave */
|
|
u8 duplex;
|
|
u32 original_mtu;
|
|
u32 link_failure_count;
|
|
u32 speed;
|
|
u16 queue_id;
|
|
u8 perm_hwaddr[ETH_ALEN];
|
|
struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
|
|
struct tlb_slave_info tlb_info;
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
struct netpoll *np;
|
|
#endif
|
|
};
|
|
|
|
/*
|
|
* 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 */
|
|
int (*recv_probe)(const struct sk_buff *, struct bonding *,
|
|
struct slave *);
|
|
rwlock_t lock;
|
|
rwlock_t curr_slave_lock;
|
|
u8 send_peer_notif;
|
|
s8 setup_by_slave;
|
|
s8 igmp_retrans;
|
|
#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 netdev_hw_addr_list mc_list;
|
|
int (*xmit_hash_policy)(struct sk_buff *, int);
|
|
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 workqueue_struct *wq;
|
|
struct delayed_work mii_work;
|
|
struct delayed_work arp_work;
|
|
struct delayed_work alb_work;
|
|
struct delayed_work ad_work;
|
|
struct delayed_work mcast_work;
|
|
#ifdef CONFIG_DEBUG_FS
|
|
/* debugging suport via debugfs */
|
|
struct dentry *debug_dir;
|
|
#endif /* CONFIG_DEBUG_FS */
|
|
};
|
|
|
|
static inline bool bond_vlan_used(struct bonding *bond)
|
|
{
|
|
return !list_empty(&bond->vlan_list);
|
|
}
|
|
|
|
#define bond_slave_get_rcu(dev) \
|
|
((struct slave *) rcu_dereference(dev->rx_handler_data))
|
|
|
|
/**
|
|
* 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) {
|
|
return slave;
|
|
}
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
|
|
{
|
|
if (!slave || !slave->dev->master) {
|
|
return NULL;
|
|
}
|
|
|
|
return 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);
|
|
}
|
|
|
|
static inline void bond_set_active_slave(struct slave *slave)
|
|
{
|
|
slave->backup = 0;
|
|
}
|
|
|
|
static inline void bond_set_backup_slave(struct slave *slave)
|
|
{
|
|
slave->backup = 1;
|
|
}
|
|
|
|
static inline int bond_slave_state(struct slave *slave)
|
|
{
|
|
return slave->backup;
|
|
}
|
|
|
|
static inline bool bond_is_active_slave(struct slave *slave)
|
|
{
|
|
return !bond_slave_state(slave);
|
|
}
|
|
|
|
#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 << bond_slave_state(slave));
|
|
}
|
|
|
|
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;
|
|
}
|
|
|
|
#ifdef CONFIG_NET_POLL_CONTROLLER
|
|
static inline void bond_netpoll_send_skb(const struct slave *slave,
|
|
struct sk_buff *skb)
|
|
{
|
|
struct netpoll *np = slave->np;
|
|
|
|
if (np)
|
|
netpoll_send_skb(np, skb);
|
|
}
|
|
#else
|
|
static inline void bond_netpoll_send_skb(const struct slave *slave,
|
|
struct sk_buff *skb)
|
|
{
|
|
}
|
|
#endif
|
|
|
|
static inline void bond_set_slave_inactive_flags(struct slave *slave)
|
|
{
|
|
struct bonding *bond = netdev_priv(slave->dev->master);
|
|
if (!bond_is_lb(bond))
|
|
bond_set_backup_slave(slave);
|
|
if (!bond->params.all_slaves_active)
|
|
slave->inactive = 1;
|
|
}
|
|
|
|
static inline void bond_set_slave_active_flags(struct slave *slave)
|
|
{
|
|
bond_set_active_slave(slave);
|
|
slave->inactive = 0;
|
|
}
|
|
|
|
static inline bool bond_is_slave_inactive(struct slave *slave)
|
|
{
|
|
return slave->inactive;
|
|
}
|
|
|
|
static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
|
|
{
|
|
struct in_device *in_dev;
|
|
__be32 addr = 0;
|
|
|
|
rcu_read_lock();
|
|
in_dev = __in_dev_get_rcu(dev);
|
|
|
|
if (in_dev)
|
|
addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);
|
|
|
|
rcu_read_unlock();
|
|
return addr;
|
|
}
|
|
|
|
struct bond_net;
|
|
|
|
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_create_sysfs(struct bond_net *net);
|
|
void bond_destroy_sysfs(struct bond_net *net);
|
|
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_create_debugfs(void);
|
|
void bond_destroy_debugfs(void);
|
|
void bond_debug_register(struct bonding *bond);
|
|
void bond_debug_unregister(struct bonding *bond);
|
|
void bond_debug_reregister(struct bonding *bond);
|
|
const char *bond_mode_name(int mode);
|
|
|
|
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
|
|
struct class_attribute class_attr_bonding_masters;
|
|
};
|
|
|
|
#ifdef CONFIG_PROC_FS
|
|
void bond_create_proc_entry(struct bonding *bond);
|
|
void bond_remove_proc_entry(struct bonding *bond);
|
|
void bond_create_proc_dir(struct bond_net *bn);
|
|
void bond_destroy_proc_dir(struct bond_net *bn);
|
|
#else
|
|
static inline void bond_create_proc_entry(struct bonding *bond)
|
|
{
|
|
}
|
|
|
|
static inline void bond_remove_proc_entry(struct bonding *bond)
|
|
{
|
|
}
|
|
|
|
static inline void bond_create_proc_dir(struct bond_net *bn)
|
|
{
|
|
}
|
|
|
|
static inline void bond_destroy_proc_dir(struct bond_net *bn)
|
|
{
|
|
}
|
|
#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[];
|
|
|
|
#endif /* _LINUX_BONDING_H */
|