[deliverable/linux.git] / drivers / net / bonding / bonding.h

/*
 * 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 "bond_3ad.h"
#include "bond_alb.h"

#define DRV_VERSION	"3.7.0"
#define DRV_RELDATE	"June 2, 2010"
#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 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) && \
		     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;
	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];
	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;
	__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;
	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 */
	u32    original_mtu;
	u32    link_failure_count;
	u8     perm_hwaddr[ETH_ALEN];
	u16    speed;
	u8     duplex;
	u16    queue_id;
	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 */
	rwlock_t lock;
	rwlock_t curr_slave_lock;
	s8       kill_timers;
	s8	 send_grat_arp;
	s8	 send_unsol_na;
	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);
	__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;
	struct   delayed_work mcast_work;
#if defined(CONFIG_IPV6) || defined(CONFIG_IPV6_MODULE)
	struct   in6_addr master_ipv6;
#endif
#ifdef CONFIG_DEBUG_FS
	/* debugging suport via debugfs */
	struct	 dentry *debug_dir;
#endif /* CONFIG_DEBUG_FS */
};

#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;
}

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(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 *);
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
};

#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[];

#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 */
Commit	Line	Data
1da177e4 LT	1	/*
	2	* Bond several ethernet interfaces into a Cisco, running 'Etherchannel'.
	3	*
	4	* Portions are (c) Copyright 1995 Simon "Guru Aleph-Null" Janes
	5	* NCM: Network and Communications Management, Inc.
	6	*
	7	* BUT, I'm the one who modified it for ethernet, so:
	8	* (c) Copyright 1999, Thomas Davis, tadavis@lbl.gov
	9	*
	10	* This software may be used and distributed according to the terms
	11	* of the GNU Public License, incorporated herein by reference.
	12	*
1da177e4 LT	13	*/
	14
	15	#ifndef _LINUX_BONDING_H
	16	#define _LINUX_BONDING_H
	17
	18	#include <linux/timer.h>
	19	#include <linux/proc_fs.h>
	20	#include <linux/if_bonding.h>
e843fa50	21	#include <linux/cpumask.h>
305d552a	22	#include <linux/in6.h>
8a8efa22	23	#include <linux/netpoll.h>
1da177e4 LT	24	#include "bond_3ad.h"
	25	#include "bond_alb.h"
	26
bb1d9123 AG	27	#define DRV_VERSION "3.7.0"
bb1d9123 AG	28	#define DRV_RELDATE "June 2, 2010"
1da177e4 LT	29	#define DRV_NAME "bonding"
	30	#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
	31
bd33acc3 AW	32	#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
bd33acc3 AW	33
1da177e4 LT	34	#define BOND_MAX_ARP_TARGETS 16
1da177e4 LT	35
1da177e4 LT	36	#define IS_UP(dev) \
	37	((((dev)->flags & IFF_UP) == IFF_UP) && \
	38	netif_running(dev) && \
	39	netif_carrier_ok(dev))
	40
	41	/*
	42	* Checks whether bond is ready for transmit.
	43	*
	44	* Caller must hold bond->lock
	45	*/
	46	#define BOND_IS_OK(bond) \
	47	(((bond)->dev->flags & IFF_UP) && \
	48	netif_running((bond)->dev) && \
	49	((bond)->slave_cnt > 0))
	50
	51	/*
	52	* Checks whether slave is ready for transmit.
	53	*/
	54	#define SLAVE_IS_OK(slave) \
	55	(((slave)->dev->flags & IFF_UP) && \
	56	netif_running((slave)->dev) && \
	57	((slave)->link == BOND_LINK_UP) && \
e30bc066	58	bond_is_active_slave(slave))
1da177e4 LT	59
	60
	61	#define USES_PRIMARY(mode) \
	62	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	63	((mode) == BOND_MODE_TLB) \|\| \
	64	((mode) == BOND_MODE_ALB))
	65
bb1d9123 AG	66	#define TX_QUEUE_OVERRIDE(mode) \
	67	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	68	((mode) == BOND_MODE_ROUNDROBIN))
1da177e4 LT	69	/*
	70	* Less bad way to call ioctl from within the kernel; this needs to be
	71	* done some other way to get the call out of interrupt context.
	72	* Needs "ioctl" variable to be supplied by calling context.
	73	*/
	74	#define IOCTL(dev, arg, cmd) ({ \
	75	int res = 0; \
	76	mm_segment_t fs = get_fs(); \
	77	set_fs(get_ds()); \
	78	res = ioctl(dev, arg, cmd); \
	79	set_fs(fs); \
	80	res; })
	81
	82	/**
	83	* bond_for_each_slave_from - iterate the slaves list from a starting point
	84	* @bond: the bond holding this list.
	85	* @pos: current slave.
	86	* @cnt: counter for max number of moves
	87	* @start: starting point.
	88	*
	89	* Caller must hold bond->lock
	90	*/
	91	#define bond_for_each_slave_from(bond, pos, cnt, start) \
	92	for (cnt = 0, pos = start; \
	93	cnt < (bond)->slave_cnt; \
	94	cnt++, pos = (pos)->next)
	95
	96	/**
	97	* bond_for_each_slave_from_to - iterate the slaves list from start point to stop point
	98	* @bond: the bond holding this list.
	99	* @pos: current slave.
	100	* @cnt: counter for number max of moves
	101	* @start: start point.
	102	* @stop: stop point.
	103	*
	104	* Caller must hold bond->lock
	105	*/
	106	#define bond_for_each_slave_from_to(bond, pos, cnt, start, stop) \
	107	for (cnt = 0, pos = start; \
	108	((cnt < (bond)->slave_cnt) && (pos != (stop)->next)); \
	109	cnt++, pos = (pos)->next)
	110
	111	/**
	112	* bond_for_each_slave - iterate the slaves list from head
	113	* @bond: the bond holding this list.
	114	* @pos: current slave.
	115	* @cnt: counter for max number of moves
	116	*
	117	* Caller must hold bond->lock
	118	*/
	119	#define bond_for_each_slave(bond, pos, cnt) \
	120	bond_for_each_slave_from(bond, pos, cnt, (bond)->first_slave)
	121
	122
e843fa50	123	#ifdef CONFIG_NET_POLL_CONTROLLER
fb4fa76a	124	extern atomic_t netpoll_block_tx;
e843fa50 NH	125
	126	static inline void block_netpoll_tx(void)
	127	{
fb4fa76a	128	atomic_inc(&netpoll_block_tx);
e843fa50 NH	129	}
	130
	131	static inline void unblock_netpoll_tx(void)
	132	{
fb4fa76a	133	atomic_dec(&netpoll_block_tx);
e843fa50 NH	134	}
	135
	136	static inline int is_netpoll_tx_blocked(struct net_device *dev)
	137	{
080e4130	138	if (unlikely(netpoll_tx_running(dev)))
fb4fa76a	139	return atomic_read(&netpoll_block_tx);
e843fa50 NH	140	return 0;
	141	}
	142	#else
	143	#define block_netpoll_tx()
	144	#define unblock_netpoll_tx()
	145	#define is_netpoll_tx_blocked(dev) (0)
	146	#endif
	147
1da177e4 LT	148	struct bond_params {
1da177e4 LT	149	int mode;
169a3e66	150	int xmit_policy;
1da177e4	151	int miimon;
7893b249	152	int num_grat_arp;
305d552a	153	int num_unsol_na;
1da177e4	154	int arp_interval;
f5b2b966	155	int arp_validate;
1da177e4	156	int use_carrier;
dd957c57	157	int fail_over_mac;
1da177e4 LT	158	int updelay;
	159	int downdelay;
	160	int lacp_fast;
fd989c83	161	int ad_select;
1da177e4	162	char primary[IFNAMSIZ];
a549952a	163	int primary_reselect;
d3bb52b0	164	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
bb1d9123	165	int tx_queues;
ebd8e497	166	int all_slaves_active;
c2952c31	167	int resend_igmp;
1da177e4 LT	168	};
1da177e4 LT	169
12479f9a MW	170	struct bond_parm_tbl {
	171	char *modename;
	172	int mode;
	173	};
	174
ece95f7f JV	175	#define BOND_MAX_MODENAME_LEN 20
ece95f7f JV	176
1da177e4 LT	177	struct vlan_entry {
1da177e4 LT	178	struct list_head vlan_list;
d3bb52b0	179	__be32 vlan_ip;
1da177e4	180	unsigned short vlan_id;
305d552a BH	181	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	182	struct in6_addr vlan_ipv6;
	183	#endif
1da177e4 LT	184	};
	185
	186	struct slave {
e944ef79	187	struct net_device dev; / first - useful for panic debug */
1da177e4 LT	188	struct slave *next;
1da177e4 LT	189	struct slave *prev;
35d48903	190	struct bonding bond; / our master */
8bb5f96b	191	int delay;
f8a8ccd5 AG	192	unsigned long jiffies;
f8a8ccd5 AG	193	unsigned long last_arp_rx;
1da177e4	194	s8 link; /* one of BOND_LINK_XXXX */
b2220cad	195	s8 new_link;
2d7011ca JP	196	u8 backup:1, /* indicates backup slave. Value corresponds with
	197	BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	198	inactive:1; /* indicates inactive slave */
3158bf7d	199	u32 original_mtu;
1da177e4	200	u32 link_failure_count;
885a136c	201	u8 perm_hwaddr[ETH_ALEN];
1da177e4 LT	202	u16 speed;
1da177e4 LT	203	u8 duplex;
bb1d9123	204	u16 queue_id;
1da177e4 LT	205	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
1da177e4 LT	206	struct tlb_slave_info tlb_info;
8a8efa22 AW	207	#ifdef CONFIG_NET_POLL_CONTROLLER
	208	struct netpoll *np;
	209	#endif
1da177e4 LT	210	};
1da177e4 LT	211
b2220cad JV	212	/*
	213	* Link pseudo-state only used internally by monitors
	214	*/
	215	#define BOND_LINK_NOCHANGE -1
	216
1da177e4 LT	217	/*
	218	* Here are the locking policies for the two bonding locks:
	219	*
	220	* 1) Get bond->lock when reading/writing slave list.
	221	* 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
	222	* (It is unnecessary when the write-lock is put with bond->lock.)
	223	* 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
	224	* beforehand.
	225	*/
	226	struct bonding {
e944ef79	227	struct net_device dev; / first - useful for panic debug */
1da177e4 LT	228	struct slave *first_slave;
	229	struct slave *curr_active_slave;
	230	struct slave *current_arp_slave;
	231	struct slave *primary_slave;
a549952a	232	bool force_primary;
1da177e4 LT	233	s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
	234	rwlock_t lock;
	235	rwlock_t curr_slave_lock;
1da177e4	236	s8 kill_timers;
1053f62c	237	s8 send_grat_arp;
305d552a	238	s8 send_unsol_na;
d90a162a	239	s8 setup_by_slave;
c2952c31	240	s8 igmp_retrans;
1da177e4 LT	241	#ifdef CONFIG_PROC_FS
	242	struct proc_dir_entry *proc_entry;
	243	char proc_file_name[IFNAMSIZ];
	244	#endif /* CONFIG_PROC_FS */
	245	struct list_head bond_list;
22bedad3	246	struct netdev_hw_addr_list mc_list;
a361c83c	247	int (xmit_hash_policy)(struct sk_buff , int);
d3bb52b0	248	__be32 master_ip;
1da177e4	249	u16 flags;
cf5f9044	250	u16 rr_tx_counter;
1da177e4 LT	251	struct ad_bond_info ad_info;
	252	struct alb_bond_info alb_info;
	253	struct bond_params params;
	254	struct list_head vlan_list;
	255	struct vlan_group *vlgrp;
f5b2b966	256	struct packet_type arp_mon_pt;
1b76b316 JV	257	struct workqueue_struct *wq;
	258	struct delayed_work mii_work;
	259	struct delayed_work arp_work;
	260	struct delayed_work alb_work;
	261	struct delayed_work ad_work;
5a37e8ca	262	struct delayed_work mcast_work;
305d552a BH	263	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	264	struct in6_addr master_ipv6;
	265	#endif
f073c7ca TI	266	#ifdef CONFIG_DEBUG_FS
	267	/* debugging suport via debugfs */
	268	struct dentry *debug_dir;
	269	#endif /* CONFIG_DEBUG_FS */
1da177e4 LT	270	};
1da177e4 LT	271
f1c1775a JP	272	#define bond_slave_get_rcu(dev) \
	273	((struct slave *) rcu_dereference(dev->rx_handler_data))
	274
1da177e4 LT	275	/**
	276	* Returns NULL if the net_device does not belong to any of the bond's slaves
	277	*
	278	* Caller must hold bond lock for read
	279	*/
4ec952b8	280	static inline struct slave bond_get_slave_by_dev(struct bonding bond,
4ec952b8	281	struct net_device *slave_dev)
1da177e4 LT	282	{
	283	struct slave *slave = NULL;
	284	int i;
	285
	286	bond_for_each_slave(bond, slave, i) {
	287	if (slave->dev == slave_dev) {
af3e5bd5	288	return slave;
1da177e4 LT	289	}
	290	}
	291
4ec952b8	292	return NULL;
1da177e4 LT	293	}
1da177e4 LT	294
cceb904f	295	static inline struct bonding bond_get_bond_by_slave(struct slave slave)
1da177e4 LT	296	{
	297	if (!slave \|\| !slave->dev->master) {
	298	return NULL;
	299	}
	300
c04914af	301	return netdev_priv(slave->dev->master);
1da177e4 LT	302	}
1da177e4 LT	303
58402054 HE	304	static inline bool bond_is_lb(const struct bonding *bond)
58402054 HE	305	{
8e95a202 JP	306	return (bond->params.mode == BOND_MODE_TLB \|\|
8e95a202 JP	307	bond->params.mode == BOND_MODE_ALB);
58402054 HE	308	}
58402054 HE	309
e30bc066 JP	310	static inline void bond_set_active_slave(struct slave *slave)
	311	{
	312	slave->backup = 0;
	313	}
	314
	315	static inline void bond_set_backup_slave(struct slave *slave)
	316	{
	317	slave->backup = 1;
	318	}
	319
	320	static inline int bond_slave_state(struct slave *slave)
	321	{
	322	return slave->backup;
	323	}
	324
	325	static inline bool bond_is_active_slave(struct slave *slave)
	326	{
	327	return !bond_slave_state(slave);
	328	}
	329
a549952a JP	330	#define BOND_PRI_RESELECT_ALWAYS 0
	331	#define BOND_PRI_RESELECT_BETTER 1
	332	#define BOND_PRI_RESELECT_FAILURE 2
	333
3915c1e8 JV	334	#define BOND_FOM_NONE 0
	335	#define BOND_FOM_ACTIVE 1
	336	#define BOND_FOM_FOLLOW 2
	337
f5b2b966 JV	338	#define BOND_ARP_VALIDATE_NONE 0
	339	#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
	340	#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
	341	#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE \| \
	342	BOND_ARP_VALIDATE_BACKUP)
	343
079ca7da AB	344	static inline int slave_do_arp_validate(struct bonding *bond,
079ca7da AB	345	struct slave *slave)
f5b2b966	346	{
e30bc066	347	return bond->params.arp_validate & (1 << bond_slave_state(slave));
f5b2b966 JV	348	}
f5b2b966 JV	349
079ca7da	350	static inline unsigned long slave_last_rx(struct bonding *bond,
f8a8ccd5	351	struct slave *slave)
f5b2b966 JV	352	{
	353	if (slave_do_arp_validate(bond, slave))
	354	return slave->last_arp_rx;
	355
	356	return slave->dev->last_rx;
	357	}
	358
8a8efa22 AW	359	#ifdef CONFIG_NET_POLL_CONTROLLER
	360	static inline void bond_netpoll_send_skb(const struct slave *slave,
	361	struct sk_buff *skb)
	362	{
	363	struct netpoll *np = slave->np;
	364
	365	if (np)
	366	netpoll_send_skb(np, skb);
	367	}
	368	#else
	369	static inline void bond_netpoll_send_skb(const struct slave *slave,
	370	struct sk_buff *skb)
	371	{
	372	}
	373	#endif
	374
cceb904f	375	static inline void bond_set_slave_inactive_flags(struct slave *slave)
1da177e4	376	{
454d7c9b	377	struct bonding *bond = netdev_priv(slave->dev->master);
ae63e808	378	if (!bond_is_lb(bond))
e30bc066	379	bond_set_backup_slave(slave);
ebd8e497	380	if (!bond->params.all_slaves_active)
2d7011ca	381	slave->inactive = 1;
1da177e4 LT	382	}
1da177e4 LT	383
cceb904f	384	static inline void bond_set_slave_active_flags(struct slave *slave)
1da177e4	385	{
e30bc066	386	bond_set_active_slave(slave);
2d7011ca JP	387	slave->inactive = 0;
	388	}
	389
	390	static inline bool bond_is_slave_inactive(struct slave *slave)
	391	{
	392	return slave->inactive;
1da177e4 LT	393	}
	394
	395	struct vlan_entry bond_next_vlan(struct bonding bond, struct vlan_entry *curr);
	396	int bond_dev_queue_xmit(struct bonding bond, struct sk_buff skb, struct net_device *slave_dev);
ec87fd3b	397	int bond_create(struct net net, const char name);
b76cdba9 MW	398	int bond_create_sysfs(void);
b76cdba9 MW	399	void bond_destroy_sysfs(void);
6151b3d4	400	void bond_prepare_sysfs_group(struct bonding *bond);
b76cdba9 MW	401	int bond_create_slave_symlinks(struct net_device master, struct net_device slave);
b76cdba9 MW	402	void bond_destroy_slave_symlinks(struct net_device master, struct net_device slave);
a77b5325 MW	403	int bond_enslave(struct net_device bond_dev, struct net_device slave_dev);
a77b5325 MW	404	int bond_release(struct net_device bond_dev, struct net_device slave_dev);
1b76b316 JV	405	void bond_mii_monitor(struct work_struct *);
	406	void bond_loadbalance_arp_mon(struct work_struct *);
	407	void bond_activebackup_arp_mon(struct work_struct *);
a77b5325	408	void bond_set_mode_ops(struct bonding *bond, int mode);
325dcf7a	409	int bond_parse_parm(const char mode_arg, const struct bond_parm_tbl tbl);
a77b5325 MW	410	void bond_select_active_slave(struct bonding *bond);
a77b5325 MW	411	void bond_change_active_slave(struct bonding bond, struct slave new_active);
f5b2b966 JV	412	void bond_register_arp(struct bonding *);
f5b2b966 JV	413	void bond_unregister_arp(struct bonding *);
f073c7ca TI	414	void bond_create_debugfs(void);
	415	void bond_destroy_debugfs(void);
	416	void bond_debug_register(struct bonding *bond);
	417	void bond_debug_unregister(struct bonding *bond);
	418	void bond_debug_reregister(struct bonding *bond);
d30ee670	419	const char *bond_mode_name(int mode);
1da177e4	420
ec87fd3b EB	421	struct bond_net {
	422	struct net * net; /* Associated network namespace */
	423	struct list_head dev_list;
	424	#ifdef CONFIG_PROC_FS
	425	struct proc_dir_entry * proc_dir;
	426	#endif
	427	};
	428
bd33acc3 AW	429	#ifdef CONFIG_PROC_FS
	430	void bond_create_proc_entry(struct bonding *bond);
	431	void bond_remove_proc_entry(struct bonding *bond);
	432	void bond_create_proc_dir(struct bond_net *bn);
	433	void bond_destroy_proc_dir(struct bond_net *bn);
	434	#else
	435	static inline void bond_create_proc_entry(struct bonding *bond)
	436	{
	437	}
	438
	439	static inline void bond_remove_proc_entry(struct bonding *bond)
	440	{
	441	}
	442
	443	static inline void bond_create_proc_dir(struct bond_net *bn)
	444	{
	445	}
	446
	447	static inline void bond_destroy_proc_dir(struct bond_net *bn)
	448	{
	449	}
	450	#endif
	451
	452
b2259672	453	/* exported from bond_main.c */
ec87fd3b	454	extern int bond_net_id;
e97fd7c6 HE	455	extern const struct bond_parm_tbl bond_lacp_tbl[];
	456	extern const struct bond_parm_tbl bond_mode_tbl[];
	457	extern const struct bond_parm_tbl xmit_hashtype_tbl[];
	458	extern const struct bond_parm_tbl arp_validate_tbl[];
	459	extern const struct bond_parm_tbl fail_over_mac_tbl[];
a549952a	460	extern const struct bond_parm_tbl pri_reselect_tbl[];
b06715b7 HE	461	extern struct bond_parm_tbl ad_select_tbl[];
b06715b7 HE	462
305d552a BH	463	#if defined(CONFIG_IPV6) \|\| defined(CONFIG_IPV6_MODULE)
	464	void bond_send_unsolicited_na(struct bonding *bond);
	465	void bond_register_ipv6_notifier(void);
	466	void bond_unregister_ipv6_notifier(void);
	467	#else
	468	static inline void bond_send_unsolicited_na(struct bonding *bond)
	469	{
	470	return;
	471	}
	472	static inline void bond_register_ipv6_notifier(void)
	473	{
	474	return;
	475	}
	476	static inline void bond_unregister_ipv6_notifier(void)
	477	{
	478	return;
	479	}
	480	#endif
	481
1da177e4	482	#endif /* _LINUX_BONDING_H */