[linux-2.6-block.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 <linux/inetdevice.h>
#include <linux/etherdevice.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))

#define BOND_MODE_IS_LB(mode)			\
		(((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; })

/* slave list primitives */
#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)

#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))

/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
#define bond_first_slave(bond) \
	(bond_has_slaves(bond) ? \
		netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
		NULL)
#define bond_last_slave(bond) \
	(bond_has_slaves(bond) ? \
		netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
		NULL)

#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))

/**
 * bond_for_each_slave - iterate over all slaves
 * @bond:	the bond holding this list
 * @pos:	current slave
 * @iter:	list_head * iterator
 *
 * Caller must hold bond->lock
 */
#define bond_for_each_slave(bond, pos, iter) \
	netdev_for_each_lower_private((bond)->dev, pos, iter)

/* Caller must have rcu_read_lock */
#define bond_for_each_slave_rcu(bond, pos, iter) \
	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)

#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 arp_all_targets;
	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;
	int lp_interval;
};

struct bond_parm_tbl {
	char *modename;
	int mode;
};

#define BOND_MAX_MODENAME_LEN 20

struct slave {
	struct net_device *dev; /* first - useful for panic debug */
	struct bonding *bond; /* our master */
	int    delay;
	unsigned long jiffies;
	unsigned long last_arp_rx;
	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
	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 *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;
	u8       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;
	u16      rr_tx_counter;
	struct   ad_bond_info ad_info;
	struct   alb_bond_info alb_info;
	struct   bond_params params;
	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 support via debugfs */
	struct	 dentry *debug_dir;
#endif /* CONFIG_DEBUG_FS */
};

#define bond_slave_get_rcu(dev) \
	((struct slave *) rcu_dereference(dev->rx_handler_data))

#define bond_slave_get_rtnl(dev) \
	((struct slave *) rtnl_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)
{
	return netdev_lower_dev_get_private(bond->dev, slave_dev);
}

static inline struct bonding *bond_get_bond_by_slave(struct slave *slave)
{
	if (!slave || !slave->bond)
		return NULL;
	return slave->bond;
}

static inline bool bond_is_lb(const struct bonding *bond)
{
	return BOND_MODE_IS_LB(bond->params.mode);
}

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_TARGETS_ANY		0
#define BOND_ARP_TARGETS_ALL		1

#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));
}

/* Get the oldest arp which we've received on this slave for bond's
 * arp_targets.
 */
static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
						       struct slave *slave)
{
	int i = 1;
	unsigned long ret = slave->target_last_arp_rx[0];

	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
		if (time_before(slave->target_last_arp_rx[i], ret))
			ret = slave->target_last_arp_rx[i];

	return ret;
}

static inline unsigned long slave_last_rx(struct bonding *bond,
					struct slave *slave)
{
	if (slave_do_arp_validate(bond, slave)) {
		if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
			return slave_oldest_target_arp_rx(bond, slave);
		else
			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)
{
	if (!bond_is_lb(slave->bond))
		bond_set_backup_slave(slave);
	if (!slave->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;
}

static inline bool slave_can_tx(struct slave *slave)
{
	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
	    bond_is_active_slave(slave))
		return true;
	else
		return false;
}

struct bond_net;

int bond_arp_rcv(const struct sk_buff *skb, struct bonding *bond, struct slave *slave);
int bond_dev_queue_xmit(struct bonding *bond, struct sk_buff *skb, struct net_device *slave_dev);
void bond_xmit_slave_id(struct bonding *bond, struct sk_buff *skb, int slave_id);
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_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 *);
int bond_xmit_hash(struct bonding *bond, struct sk_buff *skb, int count);
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);
void bond_setup(struct net_device *bond_dev);
unsigned int bond_get_num_tx_queues(void);
int bond_netlink_init(void);
void bond_netlink_fini(void);
int bond_option_mode_set(struct bonding *bond, int mode);
int bond_option_active_slave_set(struct bonding *bond, struct net_device *slave_dev);

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

static inline struct slave *bond_slave_has_mac(struct bonding *bond,
					       const u8 *mac)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave(bond, tmp, iter)
		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
			return tmp;

	return NULL;
}

/* Caller must hold rcu_read_lock() for read */
static inline struct slave *bond_slave_has_mac_rcu(struct bonding *bond,
					       const u8 *mac)
{
	struct list_head *iter;
	struct slave *tmp;

	bond_for_each_slave_rcu(bond, tmp, iter)
		if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
			return tmp;

	return NULL;
}

/* Check if the ip is present in arp ip list, or first free slot if ip == 0
 * Returns -1 if not found, index if found
 */
static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
{
	int i;

	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
		if (targets[i] == ip)
			return i;
		else if (targets[i] == 0)
			break;

	return -1;
}

/* 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 arp_all_targets_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[];

/* exported from bond_netlink.c */
extern struct rtnl_link_ops bond_link_ops;

#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>
eaddcd76	24	#include <linux/inetdevice.h>
567b871e	25	#include <linux/etherdevice.h>
1da177e4 LT	26	#include "bond_3ad.h"
	27	#include "bond_alb.h"
	28
ad246c99 BH	29	#define DRV_VERSION "3.7.1"
ad246c99 BH	30	#define DRV_RELDATE "April 27, 2011"
1da177e4 LT	31	#define DRV_NAME "bonding"
	32	#define DRV_DESCRIPTION "Ethernet Channel Bonding Driver"
	33
bd33acc3 AW	34	#define bond_version DRV_DESCRIPTION ": v" DRV_VERSION " (" DRV_RELDATE ")\n"
bd33acc3 AW	35
1da177e4 LT	36	#define BOND_MAX_ARP_TARGETS 16
1da177e4 LT	37
1da177e4 LT	38	#define IS_UP(dev) \
	39	((((dev)->flags & IFF_UP) == IFF_UP) && \
	40	netif_running(dev) && \
	41	netif_carrier_ok(dev))
	42
1da177e4 LT	43	/*
	44	* Checks whether slave is ready for transmit.
	45	*/
	46	#define SLAVE_IS_OK(slave) \
	47	(((slave)->dev->flags & IFF_UP) && \
	48	netif_running((slave)->dev) && \
	49	((slave)->link == BOND_LINK_UP) && \
e30bc066	50	bond_is_active_slave(slave))
1da177e4 LT	51
	52
	53	#define USES_PRIMARY(mode) \
	54	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	55	((mode) == BOND_MODE_TLB) \|\| \
	56	((mode) == BOND_MODE_ALB))
	57
bb1d9123 AG	58	#define TX_QUEUE_OVERRIDE(mode) \
	59	(((mode) == BOND_MODE_ACTIVEBACKUP) \|\| \
	60	((mode) == BOND_MODE_ROUNDROBIN))
72be35fe JP	61
	62	#define BOND_MODE_IS_LB(mode) \
	63	(((mode) == BOND_MODE_TLB) \|\| \
	64	((mode) == BOND_MODE_ALB))
	65
1da177e4 LT	66	/*
	67	* Less bad way to call ioctl from within the kernel; this needs to be
	68	* done some other way to get the call out of interrupt context.
	69	* Needs "ioctl" variable to be supplied by calling context.
	70	*/
	71	#define IOCTL(dev, arg, cmd) ({ \
	72	int res = 0; \
	73	mm_segment_t fs = get_fs(); \
	74	set_fs(get_ds()); \
	75	res = ioctl(dev, arg, cmd); \
	76	set_fs(fs); \
	77	res; })
	78
dec1e90e	79	/* slave list primitives */
5a52405a VF	80	#define bond_slave_list(bond) (&(bond)->dev->adj_list.lower)
	81
	82	#define bond_has_slaves(bond) !list_empty(bond_slave_list(bond))
0965a1f3	83
dec1e90e	84	/* IMPORTANT: bond_first/last_slave can return NULL in case of an empty list */
dec1e90e	85	#define bond_first_slave(bond) \
5a52405a VF	86	(bond_has_slaves(bond) ? \
	87	netdev_adjacent_get_private(bond_slave_list(bond)->next) : \
	88	NULL)
dec1e90e	89	#define bond_last_slave(bond) \
5a52405a VF	90	(bond_has_slaves(bond) ? \
	91	netdev_adjacent_get_private(bond_slave_list(bond)->prev) : \
	92	NULL)
dec1e90e	93
5a52405a VF	94	#define bond_is_first_slave(bond, pos) (pos == bond_first_slave(bond))
5a52405a VF	95	#define bond_is_last_slave(bond, pos) (pos == bond_last_slave(bond))
dec1e90e	96
1da177e4	97	/**
dec1e90e	98	* bond_for_each_slave - iterate over all slaves
	99	* @bond: the bond holding this list
	100	* @pos: current slave
9caff1e7	101	* @iter: list_head * iterator
1da177e4 LT	102	*
	103	* Caller must hold bond->lock
	104	*/
9caff1e7 VF	105	#define bond_for_each_slave(bond, pos, iter) \
9caff1e7 VF	106	netdev_for_each_lower_private((bond)->dev, pos, iter)
1da177e4	107
278b2083	108	/* Caller must have rcu_read_lock */
9caff1e7 VF	109	#define bond_for_each_slave_rcu(bond, pos, iter) \
9caff1e7 VF	110	netdev_for_each_lower_private_rcu((bond)->dev, pos, iter)
278b2083	111
e843fa50	112	#ifdef CONFIG_NET_POLL_CONTROLLER
fb4fa76a	113	extern atomic_t netpoll_block_tx;
e843fa50 NH	114
	115	static inline void block_netpoll_tx(void)
	116	{
fb4fa76a	117	atomic_inc(&netpoll_block_tx);
e843fa50 NH	118	}
	119
	120	static inline void unblock_netpoll_tx(void)
	121	{
fb4fa76a	122	atomic_dec(&netpoll_block_tx);
e843fa50 NH	123	}
	124
	125	static inline int is_netpoll_tx_blocked(struct net_device *dev)
	126	{
080e4130	127	if (unlikely(netpoll_tx_running(dev)))
fb4fa76a	128	return atomic_read(&netpoll_block_tx);
e843fa50 NH	129	return 0;
	130	}
	131	#else
	132	#define block_netpoll_tx()
	133	#define unblock_netpoll_tx()
	134	#define is_netpoll_tx_blocked(dev) (0)
	135	#endif
	136
1da177e4 LT	137	struct bond_params {
1da177e4 LT	138	int mode;
169a3e66	139	int xmit_policy;
1da177e4	140	int miimon;
ad246c99	141	u8 num_peer_notif;
1da177e4	142	int arp_interval;
f5b2b966	143	int arp_validate;
8599b52e	144	int arp_all_targets;
1da177e4	145	int use_carrier;
dd957c57	146	int fail_over_mac;
1da177e4 LT	147	int updelay;
	148	int downdelay;
	149	int lacp_fast;
655f8919	150	unsigned int min_links;
fd989c83	151	int ad_select;
1da177e4	152	char primary[IFNAMSIZ];
a549952a	153	int primary_reselect;
d3bb52b0	154	__be32 arp_targets[BOND_MAX_ARP_TARGETS];
bb1d9123	155	int tx_queues;
ebd8e497	156	int all_slaves_active;
c2952c31	157	int resend_igmp;
7eacd038	158	int lp_interval;
1da177e4 LT	159	};
1da177e4 LT	160
12479f9a MW	161	struct bond_parm_tbl {
	162	char *modename;
	163	int mode;
	164	};
	165
ece95f7f JV	166	#define BOND_MAX_MODENAME_LEN 20
ece95f7f JV	167
1da177e4	168	struct slave {
e944ef79	169	struct net_device dev; / first - useful for panic debug */
35d48903	170	struct bonding bond; / our master */
8bb5f96b	171	int delay;
f8a8ccd5 AG	172	unsigned long jiffies;
f8a8ccd5 AG	173	unsigned long last_arp_rx;
8599b52e	174	unsigned long target_last_arp_rx[BOND_MAX_ARP_TARGETS];
1da177e4	175	s8 link; /* one of BOND_LINK_XXXX */
b2220cad	176	s8 new_link;
2d7011ca JP	177	u8 backup:1, /* indicates backup slave. Value corresponds with
	178	BOND_STATE_ACTIVE and BOND_STATE_BACKUP */
	179	inactive:1; /* indicates inactive slave */
5d30530e	180	u8 duplex;
3158bf7d	181	u32 original_mtu;
1da177e4	182	u32 link_failure_count;
5d30530e	183	u32 speed;
bb1d9123	184	u16 queue_id;
5d30530e	185	u8 perm_hwaddr[ETH_ALEN];
1da177e4 LT	186	struct ad_slave_info ad_info; /* HUGE - better to dynamically alloc */
1da177e4 LT	187	struct tlb_slave_info tlb_info;
8a8efa22 AW	188	#ifdef CONFIG_NET_POLL_CONTROLLER
	189	struct netpoll *np;
	190	#endif
1da177e4 LT	191	};
1da177e4 LT	192
b2220cad JV	193	/*
	194	* Link pseudo-state only used internally by monitors
	195	*/
	196	#define BOND_LINK_NOCHANGE -1
	197
1da177e4 LT	198	/*
	199	* Here are the locking policies for the two bonding locks:
	200	*
	201	* 1) Get bond->lock when reading/writing slave list.
	202	* 2) Get bond->curr_slave_lock when reading/writing bond->curr_active_slave.
	203	* (It is unnecessary when the write-lock is put with bond->lock.)
	204	* 3) When we lock with bond->curr_slave_lock, we must lock with bond->lock
	205	* beforehand.
	206	*/
	207	struct bonding {
e944ef79	208	struct net_device dev; / first - useful for panic debug */
1da177e4 LT	209	struct slave *curr_active_slave;
	210	struct slave *current_arp_slave;
	211	struct slave *primary_slave;
a549952a	212	bool force_primary;
1da177e4	213	s32 slave_cnt; /* never change this value outside the attach/detach wrappers */
de063b70 ED	214	int (recv_probe)(const struct sk_buff , struct bonding *,
de063b70 ED	215	struct slave *);
1da177e4 LT	216	rwlock_t lock;
1da177e4 LT	217	rwlock_t curr_slave_lock;
ad246c99	218	u8 send_peer_notif;
4f5474e7	219	u8 igmp_retrans;
1da177e4 LT	220	#ifdef CONFIG_PROC_FS
	221	struct proc_dir_entry *proc_entry;
	222	char proc_file_name[IFNAMSIZ];
	223	#endif /* CONFIG_PROC_FS */
	224	struct list_head bond_list;
cf5f9044	225	u16 rr_tx_counter;
1da177e4 LT	226	struct ad_bond_info ad_info;
	227	struct alb_bond_info alb_info;
	228	struct bond_params params;
1b76b316 JV	229	struct workqueue_struct *wq;
	230	struct delayed_work mii_work;
	231	struct delayed_work arp_work;
	232	struct delayed_work alb_work;
	233	struct delayed_work ad_work;
5a37e8ca	234	struct delayed_work mcast_work;
f073c7ca	235	#ifdef CONFIG_DEBUG_FS
02582e9b	236	/* debugging support via debugfs */
f073c7ca TI	237	struct dentry *debug_dir;
f073c7ca TI	238	#endif /* CONFIG_DEBUG_FS */
1da177e4 LT	239	};
1da177e4 LT	240
f1c1775a JP	241	#define bond_slave_get_rcu(dev) \
	242	((struct slave *) rcu_dereference(dev->rx_handler_data))
	243
471cb5a3 JP	244	#define bond_slave_get_rtnl(dev) \
	245	((struct slave *) rtnl_dereference(dev->rx_handler_data))
	246
1da177e4 LT	247	/**
	248	* Returns NULL if the net_device does not belong to any of the bond's slaves
	249	*
	250	* Caller must hold bond lock for read
	251	*/
4ec952b8	252	static inline struct slave bond_get_slave_by_dev(struct bonding bond,
4ec952b8	253	struct net_device *slave_dev)
1da177e4	254	{
46bb4807	255	return netdev_lower_dev_get_private(bond->dev, slave_dev);
1da177e4 LT	256	}
1da177e4 LT	257
cceb904f	258	static inline struct bonding bond_get_bond_by_slave(struct slave slave)
1da177e4	259	{
471cb5a3	260	if (!slave \|\| !slave->bond)
1da177e4	261	return NULL;
471cb5a3	262	return slave->bond;
1da177e4 LT	263	}
1da177e4 LT	264
58402054 HE	265	static inline bool bond_is_lb(const struct bonding *bond)
58402054 HE	266	{
72be35fe	267	return BOND_MODE_IS_LB(bond->params.mode);
58402054 HE	268	}
58402054 HE	269
e30bc066 JP	270	static inline void bond_set_active_slave(struct slave *slave)
	271	{
	272	slave->backup = 0;
	273	}
	274
	275	static inline void bond_set_backup_slave(struct slave *slave)
	276	{
	277	slave->backup = 1;
	278	}
	279
	280	static inline int bond_slave_state(struct slave *slave)
	281	{
	282	return slave->backup;
	283	}
	284
	285	static inline bool bond_is_active_slave(struct slave *slave)
	286	{
	287	return !bond_slave_state(slave);
	288	}
	289
a549952a JP	290	#define BOND_PRI_RESELECT_ALWAYS 0
	291	#define BOND_PRI_RESELECT_BETTER 1
	292	#define BOND_PRI_RESELECT_FAILURE 2
	293
3915c1e8 JV	294	#define BOND_FOM_NONE 0
	295	#define BOND_FOM_ACTIVE 1
	296	#define BOND_FOM_FOLLOW 2
	297
8599b52e VF	298	#define BOND_ARP_TARGETS_ANY 0
	299	#define BOND_ARP_TARGETS_ALL 1
	300
f5b2b966 JV	301	#define BOND_ARP_VALIDATE_NONE 0
	302	#define BOND_ARP_VALIDATE_ACTIVE (1 << BOND_STATE_ACTIVE)
	303	#define BOND_ARP_VALIDATE_BACKUP (1 << BOND_STATE_BACKUP)
	304	#define BOND_ARP_VALIDATE_ALL (BOND_ARP_VALIDATE_ACTIVE \| \
	305	BOND_ARP_VALIDATE_BACKUP)
	306
079ca7da AB	307	static inline int slave_do_arp_validate(struct bonding *bond,
079ca7da AB	308	struct slave *slave)
f5b2b966	309	{
e30bc066	310	return bond->params.arp_validate & (1 << bond_slave_state(slave));
f5b2b966 JV	311	}
f5b2b966 JV	312
8599b52e VF	313	/* Get the oldest arp which we've received on this slave for bond's
	314	* arp_targets.
	315	*/
	316	static inline unsigned long slave_oldest_target_arp_rx(struct bonding *bond,
	317	struct slave *slave)
	318	{
	319	int i = 1;
	320	unsigned long ret = slave->target_last_arp_rx[0];
	321
	322	for (; (i < BOND_MAX_ARP_TARGETS) && bond->params.arp_targets[i]; i++)
	323	if (time_before(slave->target_last_arp_rx[i], ret))
	324	ret = slave->target_last_arp_rx[i];
	325
	326	return ret;
	327	}
	328
079ca7da	329	static inline unsigned long slave_last_rx(struct bonding *bond,
f8a8ccd5	330	struct slave *slave)
f5b2b966	331	{
8599b52e VF	332	if (slave_do_arp_validate(bond, slave)) {
	333	if (bond->params.arp_all_targets == BOND_ARP_TARGETS_ALL)
	334	return slave_oldest_target_arp_rx(bond, slave);
	335	else
	336	return slave->last_arp_rx;
	337	}
f5b2b966 JV	338
	339	return slave->dev->last_rx;
	340	}
	341
8a8efa22 AW	342	#ifdef CONFIG_NET_POLL_CONTROLLER
	343	static inline void bond_netpoll_send_skb(const struct slave *slave,
	344	struct sk_buff *skb)
	345	{
	346	struct netpoll *np = slave->np;
	347
	348	if (np)
	349	netpoll_send_skb(np, skb);
	350	}
	351	#else
	352	static inline void bond_netpoll_send_skb(const struct slave *slave,
	353	struct sk_buff *skb)
	354	{
	355	}
	356	#endif
	357
cceb904f	358	static inline void bond_set_slave_inactive_flags(struct slave *slave)
1da177e4	359	{
471cb5a3	360	if (!bond_is_lb(slave->bond))
e30bc066	361	bond_set_backup_slave(slave);
471cb5a3	362	if (!slave->bond->params.all_slaves_active)
2d7011ca	363	slave->inactive = 1;
1da177e4 LT	364	}
1da177e4 LT	365
cceb904f	366	static inline void bond_set_slave_active_flags(struct slave *slave)
1da177e4	367	{
e30bc066	368	bond_set_active_slave(slave);
2d7011ca JP	369	slave->inactive = 0;
	370	}
	371
	372	static inline bool bond_is_slave_inactive(struct slave *slave)
	373	{
	374	return slave->inactive;
1da177e4 LT	375	}
1da177e4 LT	376
eaddcd76 AG	377	static inline __be32 bond_confirm_addr(struct net_device *dev, __be32 dst, __be32 local)
	378	{
	379	struct in_device *in_dev;
	380	__be32 addr = 0;
	381
	382	rcu_read_lock();
	383	in_dev = __in_dev_get_rcu(dev);
	384
	385	if (in_dev)
	386	addr = inet_confirm_addr(in_dev, dst, local, RT_SCOPE_HOST);
	387
	388	rcu_read_unlock();
	389	return addr;
	390	}
	391
15077228 NA	392	static inline bool slave_can_tx(struct slave *slave)
	393	{
	394	if (IS_UP(slave->dev) && slave->link == BOND_LINK_UP &&
	395	bond_is_active_slave(slave))
	396	return true;
	397	else
	398	return false;
	399	}
	400
4c22400a EB	401	struct bond_net;
4c22400a EB	402
5bb9e0b5	403	int bond_arp_rcv(const struct sk_buff skb, struct bonding bond, struct slave *slave);
1da177e4	404	int bond_dev_queue_xmit(struct bonding bond, struct sk_buff skb, struct net_device *slave_dev);
15077228	405	void bond_xmit_slave_id(struct bonding bond, struct sk_buff skb, int slave_id);
ec87fd3b	406	int bond_create(struct net net, const char name);
4c22400a EB	407	int bond_create_sysfs(struct bond_net *net);
4c22400a EB	408	void bond_destroy_sysfs(struct bond_net *net);
6151b3d4	409	void bond_prepare_sysfs_group(struct bonding *bond);
a77b5325 MW	410	int bond_enslave(struct net_device bond_dev, struct net_device slave_dev);
a77b5325 MW	411	int bond_release(struct net_device bond_dev, struct net_device slave_dev);
1b76b316 JV	412	void bond_mii_monitor(struct work_struct *);
	413	void bond_loadbalance_arp_mon(struct work_struct *);
	414	void bond_activebackup_arp_mon(struct work_struct *);
32819dc1	415	int bond_xmit_hash(struct bonding bond, struct sk_buff skb, int count);
325dcf7a	416	int bond_parse_parm(const char mode_arg, const struct bond_parm_tbl tbl);
a77b5325 MW	417	void bond_select_active_slave(struct bonding *bond);
a77b5325 MW	418	void bond_change_active_slave(struct bonding bond, struct slave new_active);
f073c7ca TI	419	void bond_create_debugfs(void);
	420	void bond_destroy_debugfs(void);
	421	void bond_debug_register(struct bonding *bond);
	422	void bond_debug_unregister(struct bonding *bond);
	423	void bond_debug_reregister(struct bonding *bond);
d30ee670	424	const char *bond_mode_name(int mode);
0a2a78c4 JP	425	void bond_setup(struct net_device *bond_dev);
	426	unsigned int bond_get_num_tx_queues(void);
	427	int bond_netlink_init(void);
	428	void bond_netlink_fini(void);
72be35fe	429	int bond_option_mode_set(struct bonding *bond, int mode);
d9e32b21	430	int bond_option_active_slave_set(struct bonding bond, struct net_device slave_dev);
1da177e4	431
ec87fd3b EB	432	struct bond_net {
	433	struct net * net; /* Associated network namespace */
	434	struct list_head dev_list;
	435	#ifdef CONFIG_PROC_FS
	436	struct proc_dir_entry * proc_dir;
	437	#endif
4c22400a	438	struct class_attribute class_attr_bonding_masters;
ec87fd3b EB	439	};
ec87fd3b EB	440
bd33acc3 AW	441	#ifdef CONFIG_PROC_FS
	442	void bond_create_proc_entry(struct bonding *bond);
	443	void bond_remove_proc_entry(struct bonding *bond);
	444	void bond_create_proc_dir(struct bond_net *bn);
	445	void bond_destroy_proc_dir(struct bond_net *bn);
	446	#else
	447	static inline void bond_create_proc_entry(struct bonding *bond)
	448	{
	449	}
	450
	451	static inline void bond_remove_proc_entry(struct bonding *bond)
	452	{
	453	}
	454
	455	static inline void bond_create_proc_dir(struct bond_net *bn)
	456	{
	457	}
	458
	459	static inline void bond_destroy_proc_dir(struct bond_net *bn)
	460	{
	461	}
	462	#endif
	463
567b871e	464	static inline struct slave bond_slave_has_mac(struct bonding bond,
	465	const u8 *mac)
	466	{
9caff1e7	467	struct list_head *iter;
567b871e	468	struct slave *tmp;
567b871e	469
9caff1e7	470	bond_for_each_slave(bond, tmp, iter)
567b871e	471	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	472	return tmp;
	473
	474	return NULL;
	475	}
bd33acc3	476
28c71926	477	/* Caller must hold rcu_read_lock() for read */
	478	static inline struct slave bond_slave_has_mac_rcu(struct bonding bond,
	479	const u8 *mac)
	480	{
	481	struct list_head *iter;
	482	struct slave *tmp;
	483
	484	bond_for_each_slave_rcu(bond, tmp, iter)
	485	if (ether_addr_equal_64bits(mac, tmp->dev->dev_addr))
	486	return tmp;
	487
	488	return NULL;
	489	}
	490
87a7b84b VF	491	/* Check if the ip is present in arp ip list, or first free slot if ip == 0
	492	* Returns -1 if not found, index if found
	493	*/
	494	static inline int bond_get_targets_ip(__be32 *targets, __be32 ip)
	495	{
	496	int i;
	497
	498	for (i = 0; i < BOND_MAX_ARP_TARGETS; i++)
	499	if (targets[i] == ip)
	500	return i;
	501	else if (targets[i] == 0)
	502	break;
	503
	504	return -1;
	505	}
	506
b2259672	507	/* exported from bond_main.c */
ec87fd3b	508	extern int bond_net_id;
e97fd7c6 HE	509	extern const struct bond_parm_tbl bond_lacp_tbl[];
	510	extern const struct bond_parm_tbl bond_mode_tbl[];
	511	extern const struct bond_parm_tbl xmit_hashtype_tbl[];
	512	extern const struct bond_parm_tbl arp_validate_tbl[];
8599b52e	513	extern const struct bond_parm_tbl arp_all_targets_tbl[];
e97fd7c6	514	extern const struct bond_parm_tbl fail_over_mac_tbl[];
a549952a	515	extern const struct bond_parm_tbl pri_reselect_tbl[];
b06715b7 HE	516	extern struct bond_parm_tbl ad_select_tbl[];
b06715b7 HE	517
0a2a78c4 JP	518	/* exported from bond_netlink.c */
	519	extern struct rtnl_link_ops bond_link_ops;
	520
1da177e4	521	#endif /* _LINUX_BONDING_H */